Overview

math package of GO provides an Abs method that can be used to get the absolute value of a number.

Below is the signature of the function. It takes input a float and also returns a float.

func Abs(x float64) float64

Some special cases of Abs function are

• Abs(±0) = ±0
• Abs(±Inf) = ±Inf
• Abs(NaN) = NaN

Code:

package main

import (
    "fmt"
    "math"
)

func main() {
    res := math.Abs(-2)
    fmt.Println(res)

    res = math.Abs(2)
    fmt.Println(res)

    res = math.Abs(3.5)
    fmt.Println(res)

    res = math.Abs(-3.5)
    fmt.Println(res)
}

Output:

2
2
3.5
3.5