A simple way to find the square root of a number use the Math sqrt() function in JavaScript. It is built-in takes a number as a parameter and returns its square root.
Math.sqrt(number);Note: The square root of the number is NaN if the number is Negative or String.
JavaScript square root
Simple example code.
<!DOCTYPE html>
<html>
<body>
<script>
let a = Math.sqrt(0);
let b = Math.sqrt(1);
let c = Math.sqrt(9);
let d = Math.sqrt(64);
let e = Math.sqrt(-9);
console.log(a,b,c,d,e);
</script>
</body>
</html>Output:
Find Square Root of a Number by user input number
// take the input from the user
const n= prompt('Enter the number: ');
const res = Math.sqrt(number);
console.log(`The square root of ${n} is ${res}`);Output:
Enter the number: 9
The square root of 9 is 3Do comment if you have any doubts or suggestions on this JS Math sqrt() method topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version