# GoLang – Find Natural Logarithm – Log() Function – Examples & Explanation

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

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

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

```func Log(x float64) float64
```

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

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

`Log()` function will return the natural logarithm of the given input(`x ` – parameters).

## GoLang `Log()` Function Example 1

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Log(-5.39)
fmt.Println(x)
}
```

Output:
` NaN `

## GoLang `Log()` Function Example 2

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Log(13.476)
fmt.Println(x)
}
```

Output:
` 2.6009103255443065`

## GoLang `Log() ` Function Example 3

```package main

import "fmt"
import "math"

func main() {
var x float64
x = math.Log(97)
fmt.Println(x)
}
```

Output:
` 4.574710978503383`