1. Introduction to Else-If Ladder

What is Else-If Ladder?

An else-if ladder is a control structure that allows you to check multiple conditions in sequence. It executes the code block corresponding to the first true condition and skips the rest.

Why Use Else-If Ladder?

• Multiple condition checking in order
• Efficient decision making
• Cleaner code compared to nested if-else
• Sequential evaluation of conditions

Syntax:

if (condition1) { // Code block 1 } else if (condition2) { // Code block 2 } else if (condition3) { // Code block 3 } else { // Default code block }

2. Complete Code Examples

Example 1: Basic Else-If Ladder

import java.util.Scanner; public class BasicElseIfLadder { public static void main(String[] args) { System.out.println("=== Basic Else-If Ladder Examples ==="); // Example 1: Number classification demonstrateNumberClassification(); // Example 2: Day of week demonstrateDayOfWeek(); // Example 3: Temperature analysis demonstrateTemperatureAnalysis(); // Example 4: User role permissions demonstrateUserRoles(); } public static void demonstrateNumberClassification() { System.out.println("\n1. Number Classification:"); Scanner scanner = new Scanner(System.in); System.out.print("Enter a number: "); int number = scanner.nextInt(); // Else-if ladder for number classification if (number > 0) { System.out.println(number + " is a POSITIVE number"); } else if (number < 0) { System.out.println(number + " is a NEGATIVE number"); } else { System.out.println("The number is ZERO"); } // Additional classification if (number % 2 == 0) { System.out.println(number + " is EVEN"); } else { System.out.println(number + " is ODD"); } } public static void demonstrateDayOfWeek() { System.out.println("\n2. Day of Week:"); Scanner scanner = new Scanner(System.in); System.out.print("Enter day number (1-7): "); int dayNumber = scanner.nextInt(); // Else-if ladder for day of week if (dayNumber == 1) { System.out.println("Day " + dayNumber + ": Monday"); } else if (dayNumber == 2) { System.out.println("Day " + dayNumber + ": Tuesday"); } else if (dayNumber == 3) { System.out.println("Day " + dayNumber + ": Wednesday"); } else if (dayNumber == 4) { System.out.println("Day " + dayNumber + ": Thursday"); } else if (dayNumber == 5) { System.out.println("Day " + dayNumber + ": Friday"); } else if (dayNumber == 6) { System.out.println("Day " + dayNumber + ": Saturday"); } else if (dayNumber == 7) { System.out.println("Day " + dayNumber + ": Sunday"); } else { System.out.println("Invalid day number! Please enter 1-7."); } // Day type classification if (dayNumber >= 1 && dayNumber <= 5) { System.out.println("It's a WEEKDAY"); } else if (dayNumber == 6 || dayNumber == 7) { System.out.println("It's a WEEKEND"); } } public static void demonstrateTemperatureAnalysis() { System.out.println("\n3. Temperature Analysis:"); Scanner scanner = new Scanner(System.in); System.out.print("Enter temperature in °C: "); double temperature = scanner.nextDouble(); // Else-if ladder for temperature analysis if (temperature < 0) { System.out.println("❄️ Freezing cold! Wear heavy winter clothes."); } else if (temperature >= 0 && temperature < 10) { System.out.println("🥶 Very cold! Wear warm clothes."); } else if (temperature >= 10 && temperature < 20) { System.out.println("😊 Cool weather! A light jacket would be good."); } else if (temperature >= 20 && temperature < 30) { System.out.println("😍 Pleasant weather! Perfect for outdoor activities."); } else if (temperature >= 30 && temperature < 40) { System.out.println("🥵 Hot! Stay hydrated and wear light clothes."); } else { System.out.println("🔥 Extremely hot! Avoid going outside if possible."); } // Additional weather suggestions if (temperature > 35) { System.out.println("💡 Suggestion: Use sunscreen and drink plenty of water"); } else if (temperature < 5) { System.out.println("💡 Suggestion: Wear multiple layers and protect exposed skin"); } } public static void demonstrateUserRoles() { System.out.println("\n4. User Role Permissions:"); Scanner scanner = new Scanner(System.in); System.out.print("Enter user role (admin/editor/user/guest): "); String role = scanner.nextLine().toLowerCase(); // Else-if ladder for role-based permissions if (role.equals("admin")) { System.out.println("🔐 ADMIN Permissions:"); System.out.println(" - Full system access"); System.out.println(" - User management"); System.out.println(" - Database administration"); System.out.println(" - System configuration"); } else if (role.equals("editor")) { System.out.println("✏️ EDITOR Permissions:"); System.out.println(" - Content creation and editing"); System.out.println(" - Moderate user content"); System.out.println(" - Publish articles"); } else if (role.equals("user")) { System.out.println("👤 USER Permissions:"); System.out.println(" - View content"); System.out.println(" - Comment on articles"); System.out.println(" - Personal profile management"); } else if (role.equals("guest")) { System.out.println("👋 GUEST Permissions:"); System.out.println(" - Browse public content"); System.out.println(" - Limited access"); } else { System.out.println("❌ Unknown role! Available roles: admin, editor, user, guest"); } // Access level summary if (role.equals("admin") || role.equals("editor")) { System.out.println("🔓 High-level access granted"); } else if (role.equals("user")) { System.out.println("🔒 Standard access granted"); } else { System.out.println("🚫 Restricted access"); } } }

Example 2: Student Grading System

import java.util.*; public class StudentGradingSystem { public static void main(String[] args) { System.out.println("=== Student Grading System with Else-If Ladder ==="); Scanner scanner = new Scanner(System.in); // Get student information System.out.print("Enter student name: "); String name = scanner.nextLine(); System.out.print("Enter marks obtained (0-100): "); int marks = scanner.nextInt(); System.out.print("Enter attendance percentage (0-100): "); int attendance = scanner.nextInt(); // Grade calculation using else-if ladder String grade; String performance; // Marks-based grading if (marks >= 90) { grade = "A+"; performance = "Outstanding"; } else if (marks >= 80) { grade = "A"; performance = "Excellent"; } else if (marks >= 70) { grade = "B+"; performance = "Very Good"; } else if (marks >= 60) { grade = "B"; performance = "Good"; } else if (marks >= 50) { grade = "C"; performance = "Average"; } else if (marks >= 40) { grade = "D"; performance = "Below Average"; } else { grade = "F"; performance = "Fail"; } // Attendance status String attendanceStatus; if (attendance >= 90) { attendanceStatus = "Excellent"; } else if (attendance >= 80) { attendanceStatus = "Good"; } else if (attendance >= 70) { attendanceStatus = "Satisfactory"; } else if (attendance >= 60) { attendanceStatus = "Needs Improvement"; } else { attendanceStatus = "Poor"; } // Overall result String overallResult; if (marks >= 40 && attendance >= 75) { overallResult = "PASS"; } else if (marks >= 40 && attendance < 75) { overallResult = "PASS (Attendance Warning)"; } else { overallResult = "FAIL"; } // Display report System.out.println("\n" + "=".repeat(50)); System.out.println("STUDENT REPORT CARD"); System.out.println("=".repeat(50)); System.out.println("Name: " + name); System.out.println("Marks: " + marks + "/100"); System.out.println("Attendance: " + attendance + "%"); System.out.println("Grade: " + grade); System.out.println("Performance: " + performance); System.out.println("Attendance Status: " + attendanceStatus); System.out.println("Overall Result: " + overallResult); System.out.println("=".repeat(50)); // Additional remarks based on performance System.out.println("\nREMARKS:"); if (marks >= 90 && attendance >= 90) { System.out.println("🌟 Exceptional performance! Keep up the excellent work!"); } else if (marks >= 80) { System.out.println("✅ Very good performance. Continue your hard work!"); } else if (marks >= 60) { System.out.println("📚 Good effort. There's room for improvement."); } else if (marks >= 40) { System.out.println("⚠️ You passed, but need to work harder."); if (attendance < 75) { System.out.println("📅 Improve your attendance for better results."); } } else { System.out.println("❌ You need to focus more on studies."); System.out.println("💡 Consider seeking help from teachers."); } // Subject-wise grading (simulated) System.out.println("\nSUBJECT-WISE PERFORMANCE:"); String[] subjects = {"Mathematics", "Science", "English", "History", "Computer Science"}; Random random = new Random(); for (String subject : subjects) { int subjectMarks = random.nextInt(101); // Random marks 0-100 String subjectGrade = calculateSubjectGrade(subjectMarks); System.out.printf(" %-15s: %3d/100 (%s)%n", subject, subjectMarks, subjectGrade); } } public static String calculateSubjectGrade(int marks) { // Else-if ladder for subject grade calculation if (marks >= 95) return "A+"; else if (marks >= 90) return "A"; else if (marks >= 85) return "B+"; else if (marks >= 80) return "B"; else if (marks >= 75) return "C+"; else if (marks >= 70) return "C"; else if (marks >= 60) return "D+"; else if (marks >= 50) return "D"; else if (marks >= 40) return "E"; else return "F"; } }

Example 3: E-Commerce Discount System

import java.util.*; public class ECommerceDiscountSystem { public static void main(String[] args) { System.out.println("=== E-Commerce Discount System ==="); Scanner scanner = new Scanner(System.in); Random random = new Random(); // Customer information System.out.print("Enter customer type (regular/premium/vip): "); String customerType = scanner.nextLine().toLowerCase(); System.out.print("Enter purchase amount: $"); double purchaseAmount = scanner.nextDouble(); System.out.print("Enter membership duration (in years): "); int membershipYears = scanner.nextInt(); // Calculate base discount based on customer type double baseDiscount = calculateBaseDiscount(customerType, purchaseAmount); // Calculate loyalty discount double loyaltyDiscount = calculateLoyaltyDiscount(membershipYears); // Calculate seasonal discount (random for demo) double seasonalDiscount = random.nextDouble() * 10; // 0-10% // Calculate total discount double totalDiscount = baseDiscount + loyaltyDiscount + seasonalDiscount; double maxAllowedDiscount = 50.0; // Maximum 50% discount totalDiscount = Math.min(totalDiscount, maxAllowedDiscount); // Calculate final amount double discountAmount = (purchaseAmount * totalDiscount) / 100; double finalAmount = purchaseAmount - discountAmount; // Display invoice displayInvoice(customerType, purchaseAmount, baseDiscount, loyaltyDiscount, seasonalDiscount, totalDiscount, discountAmount, finalAmount); // Additional benefits displayAdditionalBenefits(customerType, purchaseAmount, membershipYears); } public static double calculateBaseDiscount(String customerType, double purchaseAmount) { double discount = 0.0; // Else-if ladder for base discount calculation if (customerType.equals("vip")) { if (purchaseAmount >= 1000) { discount = 25.0; } else if (purchaseAmount >= 500) { discount = 20.0; } else if (purchaseAmount >= 200) { discount = 15.0; } else { discount = 10.0; } } else if (customerType.equals("premium")) { if (purchaseAmount >= 1000) { discount = 20.0; } else if (purchaseAmount >= 500) { discount = 15.0; } else if (purchaseAmount >= 200) { discount = 10.0; } else { discount = 5.0; } } else if (customerType.equals("regular")) { if (purchaseAmount >= 1000) { discount = 15.0; } else if (purchaseAmount >= 500) { discount = 10.0; } else if (purchaseAmount >= 200) { discount = 5.0; } else { discount = 0.0; } } else { System.out.println("Unknown customer type. No discount applied."); discount = 0.0; } return discount; } public static double calculateLoyaltyDiscount(int membershipYears) { double discount = 0.0; // Else-if ladder for loyalty discount if (membershipYears >= 10) { discount = 15.0; } else if (membershipYears >= 5) { discount = 10.0; } else if (membershipYears >= 3) { discount = 5.0; } else if (membershipYears >= 1) { discount = 2.0; } else { discount = 0.0; } return discount; } public static void displayInvoice(String customerType, double purchaseAmount, double baseDiscount, double loyaltyDiscount, double seasonalDiscount, double totalDiscount, double discountAmount, double finalAmount) { System.out.println("\n" + "=".repeat(60)); System.out.println(" INVOICE"); System.out.println("=".repeat(60)); System.out.printf("Customer Type: %s%n", customerType.toUpperCase()); System.out.printf("Purchase Amount: $%.2f%n", purchaseAmount); System.out.println("\nDISCOUNT BREAKDOWN:"); System.out.printf(" Base Discount (%s): %.1f%%%n", customerType, baseDiscount); System.out.printf(" Loyalty Discount: %.1f%%%n", loyaltyDiscount); System.out.printf(" Seasonal Discount: %.1f%%%n", seasonalDiscount); System.out.printf(" Total Discount: %.1f%%%n", totalDiscount); System.out.printf(" Discount Amount: $%.2f%n", discountAmount); System.out.println("-".repeat(40)); System.out.printf("FINAL AMOUNT: $%.2f%n", finalAmount); System.out.println("=".repeat(60)); } public static void displayAdditionalBenefits(String customerType, double purchaseAmount, int membershipYears) { System.out.println("\nADDITIONAL BENEFITS:"); // Else-if ladder for additional benefits if (customerType.equals("vip")) { System.out.println("🎁 VIP Benefits:"); if (purchaseAmount >= 500) { System.out.println(" - Free express shipping"); System.out.println(" - Priority customer support"); } if (membershipYears >= 3) { System.out.println(" - Exclusive VIP events access"); System.out.println(" - Personal shopping assistant"); } System.out.println(" - Early access to sales"); System.out.println(" - Extended return policy"); } else if (customerType.equals("premium")) { System.out.println("⭐ Premium Benefits:"); if (purchaseAmount >= 300) { System.out.println(" - Free standard shipping"); } if (membershipYears >= 2) { System.out.println(" - Birthday discount coupon"); } System.out.println(" - Special promotional offers"); } else if (customerType.equals("regular")) { System.out.println("👍 Regular Customer Benefits:"); if (purchaseAmount >= 200) { System.out.println(" - Discount on next purchase"); } if (membershipYears >= 1) { System.out.println(" - Loyalty points earned"); } } // Purchase-based benefits if (purchaseAmount >= 1000) { System.out.println("\n💰 Big Spender Bonus:"); System.out.println(" - Additional 5% cashback"); System.out.println(" - Free gift wrapping"); } else if (purchaseAmount >= 500) { System.out.println("\n🎯 Value Shopper Perk:"); System.out.println(" - Free product sample"); } // Membership milestone benefits if (membershipYears >= 10) { System.out.println("\n🏆 Decade Club Member!"); System.out.println(" - Special anniversary gift"); System.out.println(" - Lifetime 5% additional discount"); } else if (membershipYears >= 5) { System.out.println("\n🎉 5-Year Milestone!"); System.out.println(" - Exclusive member badge"); } } }

Example 4: Tax Calculation System

import java.util.*; public class TaxCalculationSystem { public static void main(String[] args) { System.out.println("=== Income Tax Calculation System ==="); Scanner scanner = new Scanner(System.in); // Get taxpayer information System.out.print("Enter annual income: $"); double annualIncome = scanner.nextDouble(); System.out.print("Enter age: "); int age = scanner.nextInt(); System.out.print("Are you disabled? (yes/no): "); scanner.nextLine(); // Consume newline String disabled = scanner.nextLine().toLowerCase(); System.out.print("Filing status (single/married/joint): "); String filingStatus = scanner.nextLine().toLowerCase(); // Calculate tax using else-if ladder double taxAmount = calculateIncomeTax(annualIncome, age, disabled, filingStatus); double effectiveTaxRate = (taxAmount / annualIncome) * 100; // Display tax calculation displayTaxCalculation(annualIncome, taxAmount, effectiveTaxRate, age, disabled, filingStatus); // Tax planning suggestions provideTaxSuggestions(annualIncome, taxAmount, effectiveTaxRate, age); } public static double calculateIncomeTax(double income, int age, String disabled, String filingStatus) { double tax = 0.0; // Tax exemptions and deductions double standardDeduction = calculateStandardDeduction(filingStatus, age); double taxableIncome = Math.max(0, income - standardDeduction); // Additional deduction for disabled persons if (disabled.equals("yes")) { taxableIncome = Math.max(0, taxableIncome - 75000); } // Senior citizen benefit if (age >= 60) { taxableIncome = Math.max(0, taxableIncome - 50000); } else if (age >= 80) { taxableIncome = Math.max(0, taxableIncome - 100000); } // Tax calculation using progressive tax slabs (else-if ladder) if (taxableIncome <= 250000) { tax = 0.0; // No tax } else if (taxableIncome <= 500000) { tax = (taxableIncome - 250000) * 0.05; } else if (taxableIncome <= 750000) { tax = 12500 + (taxableIncome - 500000) * 0.10; // 5% on first 2.5L + 10% on next } else if (taxableIncome <= 1000000) { tax = 37500 + (taxableIncome - 750000) * 0.15; // 12.5K + 25K + 15% on next } else if (taxableIncome <= 1250000) { tax = 75000 + (taxableIncome - 1000000) * 0.20; } else if (taxableIncome <= 1500000) { tax = 125000 + (taxableIncome - 1250000) * 0.25; } else { tax = 187500 + (taxableIncome - 1500000) * 0.30; } // Health and education cess (4%) tax = tax * 1.04; return Math.max(0, tax); } public static double calculateStandardDeduction(String filingStatus, int age) { double deduction = 0.0; // Else-if ladder for standard deduction if (filingStatus.equals("single")) { deduction = 50000; } else if (filingStatus.equals("married")) { deduction = 75000; } else if (filingStatus.equals("joint")) { deduction = 100000; } else { deduction = 50000; // Default for unknown status } // Additional deduction for senior citizens if (age >= 60) { deduction += 25000; } else if (age >= 80) { deduction += 50000; } return deduction; } public static void displayTaxCalculation(double income, double tax, double effectiveRate, int age, String disabled, String filingStatus) { System.out.println("\n" + "=".repeat(60)); System.out.println(" TAX CALCULATION SUMMARY"); System.out.println("=".repeat(60)); System.out.printf("Annual Income: $%,.2f%n", income); System.out.printf("Age: %d years%n", age); System.out.printf("Filing Status: %s%n", filingStatus.toUpperCase()); System.out.printf("Disabled: %s%n", disabled.equals("yes") ? "Yes" : "No"); System.out.println("-".repeat(40)); System.out.printf("Tax Amount: $%,.2f%n", tax); System.out.printf("Effective Tax Rate: %.2f%%%n", effectiveRate); System.out.printf("Net Income After Tax: $%,.2f%n", income - tax); System.out.println("=".repeat(60)); // Tax bracket information System.out.println("\nTAX BRACKET ANALYSIS:"); String taxBracket = getTaxBracket(effectiveRate); System.out.println("You fall in the: " + taxBracket + " bracket"); } public static String getTaxBracket(double effectiveRate) { // Else-if ladder for tax bracket classification if (effectiveRate == 0.0) { return "💰 Tax-Exempt"; } else if (effectiveRate <= 5.0) { return "🟢 Low Tax"; } else if (effectiveRate <= 10.0) { return "🟡 Moderate Tax"; } else if (effectiveRate <= 20.0) { return "🟠 Medium Tax"; } else if (effectiveRate <= 30.0) { return "🔴 High Tax"; } else { return "⚫ Very High Tax"; } } public static void provideTaxSuggestions(double income, double tax, double effectiveRate, int age) { System.out.println("\nTAX PLANNING SUGGESTIONS:"); // Income-based suggestions if (income <= 300000) { System.out.println("💡 Consider contributing to tax-saving investments"); System.out.println("💡 Explore government subsidy programs"); } else if (income <= 700000) { System.out.println("💡 Maximize Section 80C deductions (up to $1,500)"); System.out.println("💡 Consider health insurance premium deductions"); } else if (income <= 1200000) { System.out.println("💡 Optimize investments in ELSS, PPF, NPS"); System.out.println("💡 Consider home loan for additional deductions"); } else { System.out.println("💡 Consult with tax advisor for complex planning"); System.out.println("💡 Consider charitable donations for deductions"); } // Age-based suggestions if (age < 60) { System.out.println("💡 Start retirement planning early"); System.out.println("💡 Consider long-term investment strategies"); } else if (age >= 60) { System.out.println("💡 Utilize senior citizen tax benefits"); System.out.println("💡 Explore reverse mortgage options"); } // Tax rate based suggestions if (effectiveRate > 20.0) { System.out.println("💡 High tax burden - consider tax-efficient investments"); System.out.println("💡 Explore tax-loss harvesting strategies"); } else if (effectiveRate < 5.0) { System.out.println("💡 Low tax burden - focus on wealth accumulation"); } // Additional general suggestions System.out.println("\nGENERAL TAX TIPS:"); System.out.println("✅ Keep all investment and expense documents"); System.out.println("✅ File returns before deadline to avoid penalties"); System.out.println("✅ Review tax-saving options annually"); System.out.println("✅ Consider professional advice for complex situations"); } }

Example 5: Complex Business Logic with Nested Else-If

```java
import java.util.*;

public class ComplexBusinessLogic {
public static void main(String[] args) {
System.out.println("=== Complex Business Logic with Nested Else-If ===");

 Scanner scanner = new Scanner(System.in); // Loan Application System demonstrateLoanApplication(scanner); // Insurance Premium Calculation demonstrateInsuranceCalculation(scanner); // Employee Performance Evaluation demonstrateEmployeeEvaluation(scanner); } public static void demonstrateLoanApplication(Scanner scanner) { System.out.println("\n1. LOAN APPLICATION SYSTEM"); System.out.println("=".repeat(50)); System.out.print("Enter annual income: $"); double income = scanner.nextDouble(); System.out.print("Enter credit score (300-850): "); int creditScore = scanner.nextInt(); System.out.print("Enter employment years: "); int employmentYears = scanner.nextInt(); System.out.print("Loan amount requested: $"); double loanAmount = scanner.nextDouble(); System.out.print("Loan purpose (home/car/personal/business): "); scanner.nextLine(); // Consume newline String loanPurpose = scanner.nextLine().toLowerCase(); // Loan eligibility check using nested else-if String eligibility = checkLoanEligibility(income, creditScore, employmentYears, loanAmount, loanPurpose); // Display results System.out.println("\nLOAN APPLICATION RESULTS:"); System.out.println("Eligibility: " + eligibility); if (!eligibility.equals("REJECTED")) { double interestRate = calculateInterestRate(creditScore, loanPurpose, employmentYears); double emi = calculateEMI(loanAmount, interestRate, getLoanTenure(loanPurpose)); System.out.printf("Approved Interest Rate: %.2f%%%n", interestRate); System.out.printf("Monthly EMI: $%.2f%n", emi); System.out.printf("Total Payable: $%.2f%n", emi * getLoanTenure(loanPurpose) * 12); } } public static String checkLoanEligibility(double income, int creditScore, int employmentYears, double loanAmount, String purpose) { // Base eligibility checks if (income <= 0 || creditScore < 300 || creditScore > 850 || employmentYears < 0) { return "REJECTED - Invalid input data"; } // Income to loan amount ratio double incomeToLoanRatio = (loanAmount / income) * 100; // Main eligibility else-if ladder if (creditScore >= 750) { // Excellent credit - most flexible criteria if (income >= 50000) { if (incomeToLoanRatio <= 500) { // Loan up to 5x annual income if (employmentYears >= 2) { return "APPROVED - Excellent terms"; } else if (employmentYears >= 1) { return "APPROVED - Good terms"; } else { return "CONDITIONAL APPROVAL - Probationary employment"; } } else { return "REDUCED AMOUNT - Loan amount too high"; } } else if (income >= 30000) { if (incomeToLoanRatio <= 300) { return "APPROVED - Standard terms"; } else { return "REDUCED AMOUNT - Income insufficient for requested amount"; } } else { return "REJECTED - Income too low"; } } else if (creditScore >= 700) { // Good credit if (income >= 60000) { if (incomeToLoanRatio <= 400 && employmentYears >= 2) { return "APPROVED - Good terms"; } else if (incomeToLoanRatio <= 300) { return "APPROVED - Standard terms"; } else { return "REDUCED AMOUNT - Adjust loan amount"; } } else if (income >= 40000) { if (incomeToLoanRatio <= 250 && employmentYears >= 3) { return "APPROVED - Standard terms"; } else { return "REJECTED - Income/employment criteria not met"; } } else { return "REJECTED - Income too low"; } } else if (creditScore >= 650) { // Fair credit - stricter criteria if (income >= 80000) { if (incomeToLoanRatio <= 300 && employmentYears >= 3) { return "APPROVED - Higher interest rate"; } else { return "REJECTED - Criteria not met for fair credit"; } } else { return "REJECTED - Credit score too low for income level"; } } else if (creditScore >= 600) { // Poor credit - very strict if (income >= 100000 && employmentYears >= 5 && incomeToLoanRatio <= 200) { return "CONDITIONAL APPROVAL - High interest rate"; } else { return "REJECTED - Credit score insufficient"; } } else { return "REJECTED - Credit score below minimum requirement"; } } public static double calculateInterestRate(int creditScore, String purpose, int employmentYears) { double baseRate = 0.0; // Base rate based on credit score (else-if ladder) if (creditScore >= 800) { baseRate = 5.0; } else if (creditScore >= 750) { baseRate = 6.0; } else if (creditScore >= 700) { baseRate = 7.5; } else if (creditScore >= 650) { baseRate = 9.0; } else if (creditScore >= 600) { baseRate = 12.0; } else { baseRate = 15.0; } // Purpose-based adjustment if (purpose.equals("home")) { baseRate -= 0.5; // Lower rate for home loans } else if (purpose.equals("car")) { baseRate += 0.0; // No change } else if (purpose.equals("business")) { baseRate += 1.0; // Higher for business } else { baseRate += 0.5; // Personal loans slightly higher } // Employment stability adjustment if (employmentYears >= 5) { baseRate -= 0.5; } else if (employmentYears < 2) { baseRate += 1.0; } return Math.max(3.0, baseRate); // Minimum 3% rate } public static double calculateEMI(double principal, double rate, int years) { double monthlyRate = rate / 12 / 100; int months = years * 12; return (principal * monthlyRate * Math.pow(1 + monthlyRate, months)) / (Math.pow(1 + monthlyRate, months) - 1); } public static int getLoanTenure(String purpose) { // Else-if ladder for loan tenure if (purpose.equals("home")) return 20; else if (purpose.equals("car")) return 7; else if (purpose.equals("business")) return 10; else return 5; // personal loan } public static void demonstrateInsuranceCalculation(Scanner scanner) { System.out.println("\n2. INSURANCE PREMIUM CALCULATION"); System.out.println("=".repeat(50)); System.out.print("Enter age: "); int age = scanner.nextInt(); System.out.print("Enter health status (excellent/good/fair/poor): "); scanner.nextLine(); String healthStatus = scanner.nextLine().toLowerCase(); System.out.print("Smoker? (yes/no): "); String smoker = scanner.nextLine().toLowerCase(); System.out.print("Coverage amount: $"); double coverage = scanner.nextDouble(); System.out.print("Policy type (term/whole/universal): "); scanner.nextLine(); String policyType = scanner.nextLine().toLowerCase(); // Calculate premium double premium = calculateInsurancePremium(age, healthStatus, smoker, coverage, policyType); System.out.printf("\nANNUAL PREMIUM: $%.2f%n", premium); System.out.printf("MONTHLY PREMIUM: $%.2f%n", premium / 12); } public static double calculateInsurancePremium(int age, String health, String smoker, double coverage, String policyType) { double baseRate = 0.0; // Age-based base rate (else-if ladder) if (age <= 25) { baseRate = 0.001; // 0.1% of coverage } else if (age <= 35) { baseRate = 0.0015; } else if (age <= 45) { baseRate = 0.002; } else if (age <= 55) { baseRate = 0.003; } else if (age <= 65) { baseRate = 0.005; } else { baseRate = 0.008; } // Health status multiplier double healthMultiplier = 1.0; if (health.equals("excellent")) { healthMultiplier = 0.8; } else if (health.equals("good")) { healthMultiplier = 1