Bitwise Operators in CPP

Bitwise operators manipulate individual bits of integers at the binary level. They are blazingly fast because they map directly to CPU instructions.

🎨 The Art of Bit Manipulation 0️⃣1️⃣

Swap Variables Without a Temporary

int a = 5, b = 7;
a = a ^ b;   // a = 5 ^ 7 = 2
b = b ^ a;   // b = 7 ^ 2 = 5
a = a ^ b;   // a = 2 ^ 5 = 7

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Check Even/Odd Instantly

bool isEven(int num) {
    return (num & 1) == 0; // Even if the last bit is 0
}

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Fast Multiplication/Division by Powers of 2

int x = 10;
x = x << 3; // 10 * 8 = 80
x = x >> 2; // 80 / 4 = 20