C program to find the square root of a number. Write a C program to enter the number and calculate the square root of a number using the sqrt function.

Write a C program to input the number and calculate the square root of the
number using `sqrt()`

function.

To calculate square root of a number use
`sqrt()`

function which is available under
`math.h`

header file that's why include
this header file also.

This problem can also be solved using loops if we don't want to use
`sqrt()`

function but we will see this
later in loops section.

Input: Enter the number: 16Output: Square root of 16.00 is 4.00

```
#include <stdio.h>
#include <math.h>
void main()
{
double number, squareroot;
printf("Enter the number: ");
scanf("%lf", &number);
squareroot = sqrt(number);
printf("Square root of %0.2lf is %0.2lf", number, squareroot);
}
```

Output

Enter the number: 16 Square root of 16.00 is 4.00

Here, `double`

data type is used to store
data and calculate square root of the number because the
`sqrt()`

function returns
`double`

type of data.

`0.2lf`

is used to print values upto 2
decimal places.