# (JavaScript programming Example for Beginners)

# JavaScript Program to Find the Square Root

#### In this example, you’ll learn to write a program to find the square root of a number in JavaScript.

To find the square root of a number in JavaScript, you can use the built-in `Math.sqrt()`

method. Its syntax is:

`Math.sqrt(number);`

Here, the `Math.sqrt()`

method takes a number and returns its square root.

## Example: Square Root of a Number

```
// take the input from the user
let number = prompt('Enter the number: ');
let result = Math.sqrt(number);
console.log(`The square root of ${number} is ${result}`);
```

**Output**

Enter the number: 9 The square root of 9 is 3

## Example 2: Square Root of Different Data Types

```
let number1 = 2.25;
let number2 = -4;
let number3 = 'hello';
let result1 = Math.sqrt(number1);
let result2 = Math.sqrt(number2);
let result3 = Math.sqrt(number3);
console.log(`The square root of ${number1} is ${result1}`);
console.log(`The square root of ${number2} is ${result2}`);
console.log(`The square root of ${number3} is ${result3}`);
```

**Output**

The square root of 2.25 is 1.5 The square root of -4 is NaN The square root of hello is NaN

- If a number is passed in the
`Math.sqrt()`

method, then the square root of that number is returned. - If a negative number is passed,
`NaN`

is returned. - If a string is passed,
`NaN`

is returned.

## JS Example for Beginners: JavaScript Program to Find the Square Root

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