freeCodeCamp/guide/english/javascript/standard-objects/math/math-sqrt/index.md

title
Math Sqrt

Math Sqrt

The function Math.sqrt() returns the square root of a number.

If a negative number is entered, NaN is returned.

sqrt() is a static method of Math, therefore it is always called as Math.sqrt() rather than as a method on another object.

Syntax

Math.sqrt(x), where x is a number.

Examples

Math.sqrt(25); // 5
Math.sqrt(169); // 13
Math.sqrt(3); // 1.732050807568
Math.sqrt(1); // 1
Math.sqrt(-5); // NaN

More Information:

MDN