GoLang – Find Natural Logarithm – Log1p() Function – Examples & Explanation

The syntax of Log1p() function in Go Language is:

func Log1p(x float64) float64

Note: float64 is a data type in Go language which has IEEE-754 64-bit floating-point numbers.
Special cases are:
Log1p(+Inf) = +Inf
Log1p(±0) = ±0
Log1p(-1) = -Inf
Log1p(x < -1) = NaN
Log1p(NaN) = NaN

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

If the x parameter is not a number (numeric value) Log1p() function returns an error .
If there is no argument (x – input value) passes to the function, then the compiler will produce an error.

Log1p() function will return the natural logarithm of 1 plus its parameter x. It is more accurate than Log(1 + x) when x is near zero.

package main

import "fmt"
import "math"

func main() {
	var x float64
	x = math.Log1p(-7.63)
	fmt.Println(x)
} 

Output:
NaN

package main

import "fmt"
import "math"

func main() {
	var x float64
	x = math.Log1p(4.33)
	fmt.Println(x)
} 

Output:
1.6733512381777533

package main

import "fmt"
import "math

func main() {
	var x float64
	x = math.Log1p(2)
	fmt.Println(x)
} 

Output:
1.0986122886681096