Math in JavaScript-tutorial
JavaScript provides powerful built-in mathematical functions and properties through the Math object.
These functions let you do calculations like square roots, powers, rounding, and more without writing complex logic.
Commonly Used Math Methods in JavaScript
Math.sqrt(x)
Returns the square root of number x.
Syntax:
Example:
Output
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Math.pow(x, y)
Returns x raised to the power of y.
Syntax:
Example:
Output
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Math.floor(x)
Rounds a number down to the nearest integer.
Syntax:
Example:
Output
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These functions let you do calculations like square roots, powers, rounding, and more without writing complex logic.
Commonly Used Math Methods in JavaScript
Math.sqrt(x)
Returns the square root of number x.
Syntax:
const squareRoot = Math.sqrt(16); // Returns 4Example:
<!DOCTYPE html><html>
<body> Square Root of 17 is: <span id="p1"></span> <script> document.getElementById('p1').innerHTML = Math.sqrt(17); </script></body>
</html>Output
Math.pow(x, y)
Returns x raised to the power of y.
Syntax:
const result = Math.pow(2, 3); // Returns 8Example:
<!DOCTYPE html><html>
<body> 3 to the power of 4 is: <span id="p3"></span> <script> document.getElementById('p3').innerHTML = Math.pow(3, 4); </script></body>
</html>Output
Math.floor(x)
Rounds a number down to the nearest integer.
Syntax:
const floored = Math.floor(3.9); // Returns 3Example:
<!DOCTYPE html><html>
<body> Floor of 4.6 is: <span id="p4"></span> <script> document.getElementById('p4').innerHTML = Math.floor(4.6); </script></body>
</html>Output
Key Point
- JavaScript Math is an object with methods, not a function itself.
- Helps in rounding, power calculation, square roots, trigonometry, and more.
- No need to import – it’s built into JavaScript.