 # Swift Double squareRoot()

In this tutorial, we will learn about the Swift Double squareRoot() method with the help of examples.

The `squareRoot()` method returns the square root of the given value.

### Example

``````// return the square root of 4
var result = 4.squareRoot()

print(result)

// Output: 2.0``````

## squareRoot() Syntax

The syntax of the double `squareRoot()` method is:

``num.squareRoot()``

Here, `num` is the number whose square root is to be calculated.

## squareRoot() Parameters

The `squareRoot()` method doesn't take any parameter.

## squareRoot() Return Values

• returns the square root of the `num`.

## Example: Swift Double squareRoot()

``````// square root of 9
var result1 = 9.squareRoot()
print(result1)

// square root of 54.7
var result2 = 54.7.squareRoot()
print(result2)

// square root of 0
var result3 = 0.squareRoot()
print(result3)``````

Output

```3.0
7.395944834840239
0.0```

In the above example, we have used the `squareRoot()` method to find the square root of the given numbers.