In this example, You will learn How to Find Square Root of a Number in C++ by using a predefined library Function ( Math.h).

```
ans = sqrt(num);
4 = sqrt(16);
```

## Example: Find square Root of a Number in C++.

```
#include<iostream>
#include<math.h>
using namespace std;
int main() {
float num, ans;
cout << "Enter a number:";
cin >> num;
ans = sqrt(num);
cout << "Square root of " << num << " is :" << ans;
return 0;
}
```

#### Output:

```
Enter a number:16
Square root of 16 is :4
```