# Swift program to find the square root of a number using the sqrt() function

Here, we are going to learn how to find the square root of a number using the sqrt() function in Swift programming language?
Submitted by Nidhi, on June 21, 2021

Problem Solution:

Here, we will calculate the square root of a number and print the result on the console screen.

Program/Source Code:

The source code to find the square root of a number using the sqrt() function is given below. The given program is compiled and executed successfully.

```// Swift program to find the square root of a number
// using the sqrt() function

import Swift
import Foundation

var num:Double  =   16.0
var res:Double  =   0.0

res = sqrt(num)

print("Square root is: ",res)
```

Output:

```Square root is:  4.0

...Program finished with exit code 0
Press ENTER to exit console.
```

Explanation:

In the above program, we imported a package Swift to use the print() function using the below statement,

```import Swift;
```

To use mathematics and some standard functions, we need to import the foundation package using the below statement,

```import Foundation;
```

Here, we created two double type variables num, res that are initialized with 16.0, 0.0 respectively. Then we calculated the square root of the specified number using the sqrt() function and printed the result on the console screen.