# GoLang – Find Square Root – Sqrt() Function – Examples & Explanation

`Sqrt()` function is used to find the square root of the given input (`x` – parameter) in Go language. The standard math package of Go programming language has `Sqrt()` function.

## Syntax of `Sqrt()` Function in Go Language

The syntax of `Sqrt()` function in Go Language is:

```func Sqrt(x float64) float64
```

Note: `float64` is a data type in Go language which has IEEE-754 64-bit floating-point numbers.
Special cases are:
```Sqrt(+Inf) = +Inf Sqrt(±0) = ±0 Sqrt(x < 0) = NaN Sqrt(NaN) = NaN```

## Parameters of `Sqrt()` Function in Go Language

`x ` – where `x` is any Valid `float64` Input value. This parameter is required.

## Error Handling

If the `x ` parameter is not a number (numeric value) `Sqrt()` function returns an `error `.
If there is no argument (`x` – input value) passes to the function, then the compiler will produce an `error`.

## Return Value of `Sqrt()` Function in GoLang

`Sqrt()` function will return the square root of the given input(`x ` – parameter).

## GoLang `Sqrt()` Function Example 1

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Sqrt(-2.4)
fmt.Println(x)
}
```

Output:
` NaN`

## GoLang `Sqrt()` Function Example 2

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Sqrt(5.4)
fmt.Println(x)
}
```

Output:
` 2.32379000772445`

## GoLang `Sqrt() ` Function Example 3

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Sqrt(4)
fmt.Println(x)
}
```

Output:
`2`