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Go – How to get the natural logarithm and sign (-1 or +1) of Gamma(x) in go

Here, We will learn how to get the natural logarithm and sign (-1 or +1) of Gamma(x) in go. We can get it by using Lgamma() function in math package in go golang.

Function prototype:

func Lgamma(n float64) (lgamma float64, sign int)

Return value:

Lgamma() function in math package returns
the natural logarithm and sign (-1 or +1)
of Gamma(n).

Example with code:

package main

import (
  "fmt"
  "math"
)

func main() {

  no, sign := math.Lgamma(1.2)
  fmt.Println(no, sign)

  no, sign = math.Lgamma(2.3)
  fmt.Println(no, sign)

  no, sign = math.Lgamma(0.0)
  fmt.Println(no, sign)

  no, sign = math.Lgamma(-2.9)
  fmt.Println(no, sign)
}

Output:

-0.08537409000331386 1
0.15418945495963046 1
+Inf 1
0.6515085442272082 -1

To learn more about golang, Please refer given below link:

https://www.techieindoor.com/go-lang-tutorial/

References:

https://golang.org/doc/
https://golang.org/pkg/
Posted in golang, math

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