JavaScript sqrt() function is used to get the square root of a number. The sqrt() function is a static function of the Math object, it must be invoked through the placeholder object called Math.
The sqrt() function returns the square root of a number and its syntax:
Math.sqrt(number);Note: If x is a negative number, NaN is returned.
JavaScript Math sqrt() example
A simple example code gets the square root of a 9.
<!DOCTYPE html>
<html>
<head>
<script>
let x = Math.sqrt(9);
console.log(x);
</script>
</head>
</html>
Output:
More Example
Math.sqrt(9); // 3
Math.sqrt(2); // 1.414213562373095
Math.sqrt(1); // 1
Math.sqrt(0); // 0
Math.sqrt(-1); // NaN
Math.sqrt(-0); // -0- A non-numeric string passed as a parameter returns NaN
- An array with more than 1 integer passed as a parameter returns NaN
- A negative number passed as a parameter returns NaN
- An empty string passed as a parameter returns NaN
- An empty array passed as a parameter returns NaN
Do comment if you have any doubts or suggestions on this JS sqrt() function.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version