26. Arithmetic Operators

Arithmetic operators perform mathematical calculations.

The Modulus Operator (%)

This is useful for determining if a number is even or odd, or for cycling through lists.

javascript let x = 10; console.log(x % 2); // Output: 0 (10 is even)

let y = 11; console.log(y % 2); // Output: 1 (11 is odd)

Order of Operations (Precedence)

JS follows standard mathematical rules (PEMDAS/BODMAS):

1. Parentheses ()
2. Exponents **
3. Multiplication *, Division /, Modulus % (left-to-right)
4. Addition +, Subtraction - (left-to-right)

javascript let result = 10 + 2 * 5; // 10 + 10 = 20 let trickyResult = (10 + 2) * 5; // 12 * 5 = 60