A Complete Guide to Programming Operators

Introduction to Operators
Arithmetic Operators
Assignment Operators
Comparison Operators
Logical Operators
Bitwise Operators
String Operators
Type Operators
Ternary/Conditional Operator
Operator Precedence
Operator Overloading
Special Operators
Short-Circuit Evaluation
Common Pitfalls
Interview Questions

Introduction to Operators

Operators are special symbols or keywords that perform operations on operands (values or variables). They are the building blocks of expressions and allow us to manipulate data, make decisions, and control program flow.

What Are Operators?

An operator is a symbol that tells the compiler or interpreter to perform a specific mathematical, logical, or relational operation.

// Basic operator examples let sum = 5 + 3; // '+' is an arithmetic operator let isEqual = (10 == 10); // '==' is a comparison operator let result = (age > 18) && (hasLicense); // '&&' is a logical operator

Types of Operators by Operand Count

Type	Description	Examples
Unary	Operates on one operand	`-5`, `!true`, `++x`
Binary	Operates on two operands	`a + b`, `x && y`
Ternary	Operates on three operands	`condition ? a : b`

Arithmetic Operators

Arithmetic operators perform mathematical calculations on numeric values.

Basic Arithmetic Operators

# Python a = 10 b = 3 print(a + b) # Addition: 13 print(a - b) # Subtraction: 7 print(a * b) # Multiplication: 30 print(a / b) # Division: 3.333... print(a // b) # Floor division: 3 print(a % b) # Modulus (remainder): 1 print(a ** b) # Exponentiation: 1000

// JavaScript let a = 10; let b = 3; console.log(a + b); // 13 console.log(a - b); // 7 console.log(a * b); // 30 console.log(a / b); // 3.333... console.log(a % b); // 1 console.log(a ** b); // 1000 (ES7+)

// Java int a = 10; int b = 3; System.out.println(a + b); // 13 System.out.println(a - b); // 7 System.out.println(a * b); // 30 System.out.println(a / b); // 3 (integer division) System.out.println(a % b); // 1

Increment and Decrement Operators

// JavaScript let x = 5; // Post-increment: returns value, then increments console.log(x++); // 5 console.log(x); // 6 // Pre-increment: increments, then returns value console.log(++x); // 7 console.log(x); // 7 // Post-decrement console.log(x--); // 7 console.log(x); // 6 // Pre-decrement console.log(--x); // 5

# Python (no ++/-- operators) x = 5 x += 1 # Instead of x++ x -= 1 # Instead of x--

Unary Plus and Minus

// JavaScript let num = "42"; let negative = -10; console.log(+num); // 42 (converts to number) console.log(-negative); // 10 (negation) console.log(-num); // -42

Assignment Operators

Assignment operators assign values to variables.

Basic Assignment

// JavaScript let x = 10; // Basic assignment

Compound Assignment Operators

# Python x = 10 x += 5 # x = x + 5 (15) x -= 3 # x = x - 3 (12) x *= 2 # x = x * 2 (24) x /= 4 # x = x / 4 (6.0) x //= 2 # x = x // 2 (3) x %= 2 # x = x % 2 (1) x **= 3 # x = x ** 3 (1)

// JavaScript let x = 10; x += 5; // 15 x -= 3; // 12 x *= 2; // 24 x /= 4; // 6 x %= 2; // 0 x **= 3; // 0 // Bitwise compound assignment x = 5; x &= 3; // 1 (101 & 011 = 001) x |= 2; // 3 (001 | 010 = 011) x ^= 1; // 2 (011 ^ 001 = 010) x <<= 1; // 4 (010 << 1 = 100) x >>= 1; // 2 (100 >> 1 = 010)

Destructuring Assignment

// JavaScript - Array destructuring let [a, b, c] = [1, 2, 3]; console.log(a, b, c); // 1, 2, 3 // Swapping variables [a, b] = [b, a]; console.log(a, b); // 2, 1 // Object destructuring let { name, age } = { name: "Alice", age: 30 }; console.log(name, age); // Alice, 30

# Python - Tuple unpacking a, b, c = 1, 2, 3 print(a, b, c) # 1, 2, 3 # Swapping a, b = b, a print(a, b) # 2, 1

Comparison Operators

Comparison operators compare two values and return a Boolean (true/false).

Equality Operators

// JavaScript - careful with equality! let x = 5; let y = "5"; console.log(x == y); // true (loose equality, type conversion) console.log(x === y); // false (strict equality, no type conversion) console.log(x != y); // false (loose inequality) console.log(x !== y); // true (strict inequality)

# Python x = 5 y = "5" print(x == y) # False (no type coercion) print(x != y) # True

Relational Operators

// JavaScript let a = 10; let b = 20; console.log(a > b); // false console.log(a >= b); // false console.log(a < b); // true console.log(a <= b); // true

Object Comparison

// JavaScript - objects compared by reference let obj1 = { name: "Alice" }; let obj2 = { name: "Alice" }; let obj3 = obj1; console.log(obj1 == obj2); // false (different references) console.log(obj1 === obj2); // false console.log(obj1 == obj3); // true (same reference) // Deep comparison would require custom logic function deepEqual(obj1, obj2) { return JSON.stringify(obj1) === JSON.stringify(obj2); }

Logical Operators

Logical operators combine Boolean values or expressions.

AND, OR, NOT

// JavaScript let isLoggedIn = true; let isAdmin = false; // AND (&&) - both must be true console.log(isLoggedIn && isAdmin); // false // OR (||) - at least one must be true console.log(isLoggedIn || isAdmin); // true // NOT (!) - inverts the value console.log(!isLoggedIn); // false console.log(!isAdmin); // true

# Python is_logged_in = True is_admin = False # AND print(is_logged_in and is_admin) # False # OR print(is_logged_in or is_admin) # True # NOT print(not is_logged_in) # False print(not is_admin) # True

Logical Operators with Non-Booleans

// JavaScript - short-circuit evaluation console.log(0 && 5); // 0 (falsy) console.log(5 && 10); // 10 (truthy) console.log(0 || 5); // 5 (truthy) console.log(5 || 10); // 5 (truthy) // Common patterns let name = userInput || "Guest"; // Default value let isValid = condition && doSomething(); // Conditional execution

# Python print(0 and 5) # 0 print(5 and 10) # 10 print(0 or 5) # 5 print(5 or 10) # 5 # Common patterns name = user_input or "Guest" # Default value

Nullish Coalescing Operator

// JavaScript - ?? operator (ES2020) let value = null ?? "default"; // "default" let value2 = 0 ?? "default"; // 0 (not null/undefined) let value3 = undefined ?? "default"; // "default" // vs OR operator let orValue = 0 || "default"; // "default" (0 is falsy)

Bitwise Operators

Bitwise operators perform operations on the binary representations of numbers.

Bitwise Operators Table

Operator	Name	Example	Result
`&`	AND	`5 & 3`	`1` (101 & 011 = 001)
`\|`	OR	`5 \| 3`	`7` (101 \| 011 = 111)
`^`	XOR	`5 ^ 3`	`6` (101 ^ 011 = 110)
`~`	NOT	`~5`	`-6` (inverts bits)
`<<`	Left shift	`5 << 1`	`10` (1010)
`>>`	Right shift	`5 >> 1`	`2` (10)
`>>>`	Zero-fill right shift	`-5 >>> 1`	`2147483645` (JS only)

Bitwise AND, OR, XOR

// JavaScript let a = 5; // Binary: 0101 let b = 3; // Binary: 0011 console.log(a & b); // 1 (0001) console.log(a | b); // 7 (0111) console.log(a ^ b); // 6 (0110)

Bitwise NOT

// JavaScript let x = 5; // Binary: 0101 console.log(~x); // -6 (11111111111111111111111111111010) // For 32-bit signed integers console.log(~x & 0xFFFFFFFF); // 4294967290 (unsigned)

Bitwise Shifts

// JavaScript let x = 5; // 0101 console.log(x << 1); // 10 (1010) (multiply by 2) console.log(x << 2); // 20 (10100) (multiply by 4) console.log(x >> 1); // 2 (10) (divide by 2) console.log(x >> 2); // 1 (1) (divide by 4) // Negative numbers let y = -5; console.log(y >> 1); // -3 (arithmetic shift preserves sign)

Bitwise Flags Example

// Using bitwise operators for flags const PERMISSIONS = { READ: 1 << 0, // 1 (001) WRITE: 1 << 1, // 2 (010) DELETE: 1 << 2, // 4 (100) ADMIN: 1 << 3 // 8 (1000) }; let userPermissions = PERMISSIONS.READ | PERMISSIONS.WRITE; // 3 (011) // Check permission function hasPermission(permissions, permission) { return (permissions & permission) === permission; } console.log(hasPermission(userPermissions, PERMISSIONS.READ)); // true console.log(hasPermission(userPermissions, PERMISSIONS.DELETE)); // false // Add permission userPermissions |= PERMISSIONS.DELETE; // Now has DELETE (7) // Remove permission userPermissions &= ~PERMISSIONS.WRITE; // Remove WRITE (5) // Toggle permission userPermissions ^= PERMISSIONS.READ; // Toggle READ

String Operators

Concatenation

// JavaScript let firstName = "John"; let lastName = "Doe"; // + operator for concatenation let fullName = firstName + " " + lastName; console.log(fullName); // "John Doe" // Template literals (ES6) let greeting = `Hello, ${firstName} ${lastName}!`; console.log(greeting); // "Hello, John Doe!"

# Python first_name = "John" last_name = "Doe" # + operator full_name = first_name + " " + last_name print(full_name) # "John Doe" # f-strings (Python 3.6+) greeting = f"Hello, {first_name} {last_name}!" print(greeting) # "Hello, John Doe!" # format() method greeting2 = "Hello, {} {}!".format(first_name, last_name)

String Comparison

# Python - lexicographic comparison print("apple" < "banana") # True print("Apple" < "apple") # True (ASCII comparison) print("abc" == "abc") # True # Case-insensitive comparison print("APPLE".lower() == "apple".lower()) # True

// JavaScript console.log("apple" < "banana"); // true console.log("Apple" < "apple"); // true console.log("abc" === "abc"); // true // Locale-aware comparison console.log("apple".localeCompare("banana")); // -1

Type Operators

typeof Operator

// JavaScript console.log(typeof 42); // "number" console.log(typeof "Hello"); // "string" console.log(typeof true); // "boolean" console.log(typeof undefined); // "undefined" console.log(typeof null); // "object" (quirk) console.log(typeof {}); // "object" console.log(typeof []); // "object" console.log(typeof function(){}); // "function" // Checking array type console.log(Array.isArray([])); // true

# Python print(type(42)) # <class 'int'> print(type("Hello")) # <class 'str'> print(type(True)) # <class 'bool'> print(type(None)) # <class 'NoneType'> print(type([])) # <class 'list'> print(type({})) # <class 'dict'> print(type(lambda x: x)) # <class 'function'> # isinstance() - better for type checking print(isinstance(42, int)) # True print(isinstance([], list)) # True print(isinstance("abc", str)) # True

instanceof Operator

// JavaScript class Animal {} class Dog extends Animal {} let dog = new Dog(); console.log(dog instanceof Dog); // true console.log(dog instanceof Animal); // true console.log(dog instanceof Object); // true // Primitive types console.log(42 instanceof Number); // false (primitive) console.log(new Number(42) instanceof Number); // true

in Operator

// JavaScript let person = { name: "Alice", age: 30 }; console.log("name" in person); // true console.log("salary" in person); // false console.log("toString" in person); // true (inherited) // Arrays let arr = [10, 20, 30]; console.log(0 in arr); // true (index) console.log(3 in arr); // false console.log("length" in arr); // true

# Python person = {"name": "Alice", "age": 30} print("name" in person) # True print("salary" in person) # False # Lists arr = [10, 20, 30] print(10 in arr) # True (value, not index)

Ternary/Conditional Operator

The ternary operator is a shorthand for if-else statements.

Basic Ternary

// JavaScript let age = 18; let status = age >= 18 ? "Adult" : "Minor"; console.log(status); // "Adult" // Nested ternary let grade = 85; let letter = grade >= 90 ? "A" : grade >= 80 ? "B" : grade >= 70 ? "C" : grade >= 60 ? "D" : "F"; console.log(letter); // "B"

# Python age = 18 status = "Adult" if age >= 18 else "Minor" print(status) # "Adult" # Nested ternary (use sparingly) grade = 85 letter = "A" if grade >= 90 else \ "B" if grade >= 80 else \ "C" if grade >= 70 else \ "D" if grade >= 60 else "F" print(letter) # "B"

Practical Usage

// Conditional function calls let isLoggedIn = true; isLoggedIn ? showDashboard() : showLogin(); // Conditional rendering (React) return ( <div> {isLoading ? <Spinner /> : <Content />} </div> ); // Default values let name = inputName ? inputName : "Guest"; let name = inputName || "Guest"; // Alternative with OR

Operator Precedence

Operator precedence determines the order in which operations are evaluated.

Precedence Table (Highest to Lowest)

// JavaScript precedence console.log(2 + 3 * 4); // 14 (multiplication first) console.log((2 + 3) * 4); // 20 (parentheses first) // Full precedence order (simplified): // 1. () - Parentheses // 2. ** - Exponentiation // 3. * / % - Multiplication, Division, Remainder // 4. + - - Addition, Subtraction // 5. << >> >>> - Bitwise shifts // 6. < <= > >= - Relational // 7. == != === !== - Equality // 8. & - Bitwise AND // 9. ^ - Bitwise XOR // 10. | - Bitwise OR // 11. && - Logical AND // 12. || - Logical OR // 13. ?? - Nullish coalescing // 14. ? : - Ternary // 15. = += -= etc. - Assignment

Associativity

// Left-associative (most operators) console.log(10 - 5 - 2); // (10 - 5) - 2 = 3 // Right-associative (exponentiation, assignment) console.log(2 ** 3 ** 2); // 2 ** (3 ** 2) = 512 let a = b = c = 5; // Right-associative

Operator Overloading

Operator overloading allows custom behavior for operators with user-defined types.

Python Operator Overloading

# Python - operator overloading with magic methods class Vector: def __init__(self, x, y): self.x = x self.y = y def __add__(self, other): return Vector(self.x + other.x, self.y + other.y) def __sub__(self, other): return Vector(self.x - other.x, self.y - other.y) def __mul__(self, scalar): return Vector(self.x * scalar, self.y * scalar) def __eq__(self, other): return self.x == other.x and self.y == other.y def __repr__(self): return f"Vector({self.x}, {self.y})" v1 = Vector(2, 3) v2 = Vector(4, 5) print(v1 + v2) # Vector(6, 8) print(v1 - v2) # Vector(-2, -2) print(v1 * 3) # Vector(6, 9) print(v1 == v2) # False

JavaScript Operator Overloading (No direct support)

// JavaScript - no operator overloading class Vector { constructor(x, y) { this.x = x; this.y = y; } add(other) { return new Vector(this.x + other.x, this.y + other.y); } toString() { return `Vector(${this.x}, ${this.y})`; } } let v1 = new Vector(2, 3); let v2 = new Vector(4, 5); console.log(v1.add(v2).toString()); // Vector(6, 8)

Special Operators

Spread Operator

// JavaScript - spread operator (...) // Arrays let arr1 = [1, 2, 3]; let arr2 = [...arr1, 4, 5]; // [1, 2, 3, 4, 5] let copy = [...arr1]; // Shallow copy // Objects let obj1 = { a: 1, b: 2 }; let obj2 = { ...obj1, c: 3 }; // { a: 1, b: 2, c: 3 } // Function calls let numbers = [1, 2, 3, 4, 5]; let max = Math.max(...numbers); // 5

# Python - unpacking operator (* and **) # Lists/tuples arr1 = [1, 2, 3] arr2 = [*arr1, 4, 5] # [1, 2, 3, 4, 5] copy = [*arr1] # Shallow copy # Dictionaries dict1 = {"a": 1, "b": 2} dict2 = {**dict1, "c": 3} # {"a": 1, "b": 2, "c": 3} # Function calls numbers = [1, 2, 3, 4, 5] print(*numbers) # 1 2 3 4 5

Optional Chaining

// JavaScript - optional chaining (?.) let user = { profile: { name: "Alice" } }; console.log(user?.profile?.name); // "Alice" console.log(user?.address?.city); // undefined (no error) console.log(user?.nonExistent?.value); // undefined // With function calls let obj = { method: () => "result" }; console.log(obj.method?.()); // "result" console.log(obj.noMethod?.()); // undefined

Nullish Coalescing

// JavaScript - nullish coalescing (??) let value = null ?? "default"; // "default" let value2 = undefined ?? "default"; // "default" let value3 = 0 ?? "default"; // 0 let value4 = "" ?? "default"; // "" let value5 = false ?? "default"; // false // Unlike OR (||) which treats falsy values as default let orValue = 0 || "default"; // "default"

Pipeline Operator

// JavaScript (proposal) - pipeline operator (|>) // Not yet widely supported // const result = "Hello" |> toUpperCase |> split('') |> reverse |> join(''); // Current approach with chaining const result = "Hello".toUpperCase().split('').reverse().join('');

Short-Circuit Evaluation

Logical operators use short-circuit evaluation to optimize performance and enable conditional execution.

AND (&&) Short-Circuit

// JavaScript - && stops at first falsy value console.log(false && expensiveFunction()); // false (expensiveFunction not called) // Common pattern: conditional execution isLoggedIn && showDashboard(); // Only calls showDashboard if isLoggedIn is true

# Python def expensive_function(): print("Called!") return True print(False and expensive_function()) # False (function not called)

OR (||) Short-Circuit

// JavaScript - || stops at first truthy value console.log(true || expensiveFunction()); // true (function not called) // Common pattern: default values let name = userInput || "Guest";

Nullish Coalescing (??) Short-Circuit

// JavaScript - ?? stops at first non-null/undefined let value = null ?? expensiveFunction(); // expensiveFunction called let value2 = 0 ?? expensiveFunction(); // 0 (function not called)

Common Pitfalls

1. Floating Point Precision

// JavaScript console.log(0.1 + 0.2); // 0.30000000000000004 console.log(0.1 + 0.2 === 0.3); // false // Solution: use tolerance const EPSILON = 0.000001; console.log(Math.abs((0.1 + 0.2) - 0.3) < EPSILON); // true

# Python print(0.1 + 0.2) # 0.30000000000000004 # Solution from decimal import Decimal print(Decimal('0.1') + Decimal('0.2')) # 0.3

2. Loose vs Strict Equality

// JavaScript console.log(5 == "5"); // true (type coercion) console.log(5 === "5"); // false (strict) console.log(0 == false); // true console.log(0 === false);// false // Best practice: use === always

3. Assignment vs Comparison

// JavaScript - common mistake if (x = 5) { // Assignment, not comparison! // Always executes (5 is truthy) } // Correct if (x === 5) { // Comparison }

# Python - assignment not allowed in if # if x = 5: # SyntaxError! if x == 5: # Correct pass

4. NaN Comparisons

// JavaScript console.log(NaN === NaN); // false console.log(isNaN(NaN)); // true // Number.isNaN is more reliable console.log(Number.isNaN(NaN)); // true console.log(Number.isNaN("abc")); // false (string not converted)

5. Integer Division

// JavaScript - always floating point console.log(5 / 2); // 2.5 // For integer division console.log(Math.floor(5 / 2)); // 2 console.log(5 >> 1); // 2 (bitwise)

// Java - integer division truncates int x = 5 / 2; // 2 double y = 5.0 / 2; // 2.5

Interview Questions

Q1: What's the difference between `==` and `===` in JavaScript?

// == compares values after type coercion console.log(5 == "5"); // true console.log(0 == false); // true console.log(null == undefined); // true // === compares values without type coercion console.log(5 === "5"); // false console.log(0 === false); // false console.log(null === undefined); // false // Best practice: always use === for predictable behavior

Q2: What will this output?

console.log(1 + "2" + "2"); // "122" console.log(1 + +"2" + "2"); // "32" console.log(1 + -"1" + "2"); // "02" console.log(+"1" + "1" + "2"); // "112" console.log("A" - "B" + "2"); // "NaN2" console.log("A" - "B" + 2); // NaN // Explanation: // +"2" converts "2" to number 2 // -"1" converts "1" to number -1 // "A" - "B" results in NaN

Q3: What's the output of this code?

let x = 5; console.log(x++); // 5 console.log(++x); // 7 console.log(x); // 7

Q4: How does short-circuit evaluation work?

// AND (&&) - returns first falsy or last truthy console.log(0 && 5); // 0 console.log(5 && 10); // 10 console.log(5 && 10 && 0 && 20); // 0 // OR (||) - returns first truthy or last falsy console.log(0 || 5); // 5 console.log(5 || 10); // 5 console.log(0 || "" || null); // null // Practical use let user = getUser() || defaultUser; // Default value isAdmin && showAdminPanel(); // Conditional execution

Q5: Explain the difference between `&` and `&&` in JavaScript?

// & is bitwise AND (operates on binary representation) console.log(5 & 3); // 1 (0101 & 0011 = 0001) // && is logical AND (operates on truthiness) console.log(5 && 3); // 3 (short-circuits, returns last truthy) // For booleans console.log(true & true); // 1 (numeric) console.log(true && true); // true (boolean)

Q6: What will this Python code output?

x = 5 y = 3 print(x / y) # 1.666... print(x // y) # 1 print(x % y) # 2 print(x ** y) # 125 print(x == y) # False print(x != y) # True

Q7: Explain the difference between `is` and `==` in Python?

# == compares values a = [1, 2, 3] b = [1, 2, 3] print(a == b) # True (same values) print(a is b) # False (different objects) # is compares identity (memory location) c = a print(a is c) # True (same object) # With small integers (caching) x = 256 y = 256 print(x is y) # True (cached) x = 257 y = 257 print(x is y) # False (not cached)

Conclusion

Operators are fundamental building blocks of programming that allow us to manipulate data, make decisions, and control program flow.

Key Takeaways

Category	Operators	Use Case
Arithmetic	`+`, `-`, ``, `/`, `%`, `*`	Mathematical calculations
Assignment	`=`, `+=`, `-=`, `*=`, `/=`	Variable assignment
Comparison	`==`, `===`, `!=`, `!==`, `<`, `>`, `<=`, `>=`	Value comparison
Logical	`&&`, `\|\|`, `!`	Boolean logic
Bitwise	`&`, `\|`, `^`, `~`, `<<`, `>>`	Bit manipulation
Ternary	`condition ? a : b`	Conditional expressions

Best Practices

Use strict equality (=== in JS) to avoid type coercion surprises
Understand short-circuit evaluation for conditional execution
Be aware of floating point precision issues
Use parentheses to make precedence explicit
Avoid complex expressions - break them down for readability
Consider operator overload in languages that support it
Use bitwise operators carefully (mostly for flags and low-level operations)

Quick Reference

// Common operator patterns // Default values let name = input || "Guest"; // Conditional execution isValid && doSomething(); // Increment/Decrement let i = 0; i++; // post-increment ++i; // pre-increment // Bitwise flags const READ = 1 << 0; const WRITE = 1 << 1; let permissions = READ | WRITE; // Ternary let status = age >= 18 ? "adult" : "minor";

Understanding operators is essential for writing efficient and expressive code. Master these concepts to become a more effective programmer!

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https://macronepal.com/13707-2/
https://macronepal.com/13702-2/

Online Compilers

Complete Guide to Advanced C Programming, Systems, GPU, Kernel & Parallel Computing

https://macronepal.com/bash/the-building-blocks-of-c-a-complete-guide-to-variables-and-data-types/
Explains variables and data types in C, including how different types define memory usage, value range, and program data handling.

https://macronepal.com/bash/hello-world-in-c-the-program-that-started-it-all/
Explains the basic “Hello World” program in C, covering program structure, main function, and output printing.

https://macronepal.com/bash/advanced-i-o-operations-in-c-mastering-input-output-for-high-performance-applications/
Explains advanced input/output operations in C, including efficient data handling and file-based I/O for high-performance applications.

https://macronepal.com/bash/harnessing-massive-parallelism-a-complete-guide-to-gpu-programming-in-c/
Explains GPU programming in C for massive parallel processing, enabling faster computation for complex workloads.

https://macronepal.com/bash/understanding-the-unseen-a-complete-guide-to-reverse-engineering-c-programs/
Explains reverse engineering of C programs by analyzing compiled binaries to understand program behavior and logic.

https://macronepal.com/bash/protecting-intellectual-property-a-complete-guide-to-code-obfuscation-in-c/
Explains code obfuscation techniques in C to protect source code and make reverse engineering difficult.

https://macronepal.com/bash/kernel-programming-in-c-a-comprehensive-guide-to-linux-kernel-development/
Explains Linux kernel programming in C, focusing on low-level system operations and kernel module development.

https://macronepal.com/bash/kernel-programming-a-complete-guide-to-writing-device-drivers-in-c/
Explains how to write device drivers in C for Linux, enabling communication between hardware and the operating system.

https://macronepal.com/bash/parallel-data-processing-a-complete-guide-to-simd-programming-in-c/
Explains SIMD programming in C for processing multiple data points in parallel using a single instruction.

https://macronepal.com/bash/harnessing-multi-core-power-a-complete-guide-to-parallel-programming-in-c/
Explains multi-core parallel programming in C by distributing tasks across threads to improve performance and efficiency.