JS Tutorial

JavaScript Operator Precedence ⚖️

Operator precedence determines the order in which operations are performed in an expression. Higher precedence operators are evaluated before lower precedence ones.

🧠 Basic Example

Consider the following expression:

let result = 10 + 5 * 2; // result is 20

Multiplication (*) has higher precedence than addition (+), so it’s evaluated first.

📋 Precedence Table (Simplified)

• Highest → () (Parentheses)
• ., [], () (Member access, function call)
• ++, -- (Postfix)
• !, typeof, ++, -- (Unary)
• *, /, % (Multiplicative)
• +, - (Additive)
• <<, >> (Bitwise shift)
• <, >, ==, === (Comparison)
• &&, || (Logical)
• = (Assignment)
• Lowest → , (Comma)

🧪 Try It: Live Precedence Test

💡 Use Parentheses!

Always use parentheses to make your expressions more readable and to ensure proper order of evaluation, especially when mixing multiple operators.