# Javascript program to enter any number and calculate its square root

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Javascript program to enter any number and calculate its square root. There are you will learn how to find the square root of any number in the javascript language.

**Formula:**

*r = n^(1/2)*

**where:**

`r = root`

`n = number`

There are two ways to implement these formulae:

- By using the
**Math.sqrt()**function - Second, by using
**Math.pow()**function

1. By using the **Math.sqrt()** function

```
/* Javascript program to calculate the square root of a number */
<script type="text/javascript">
var n, r;
// n = number
// r = root
/* Calculate square root of number */
n = 25;
r = Math.sqrt(n);
document.write("Square root of " + n + " = " + r);
</script>
```

**Output Screen:**

Square root of 25 = 5

2. By using **Math.pow()** function

```
/* Javascript program to calculate the square root of a number */
<script type="text/javascript">
var n, r;
// n = number
// r = root
/* Calculate square root of number */
n = 25;
r = Math.pow(n, 0.5);
document.write("Square root of " + n + " = " + r);
</script>
```

**Output Screen:**

Square root of 25 = 5