Arithmetic Operators

int a = 15 / 4;    // 3 (truncated)
double b = 15.0 / 4; // 3.75

When both operands are integers, the result is truncated. Cast to double for decimal results.

// Check even/odd
if (n % 2 == 0) // even
// Wrap around
int idx = i % size;

The modulus operator is essential in DSA — used for hashing, cyclic indexing, and modular arithmetic.