How to calculate the absolute value of a number in Go?

In Go, you can calculate the absolute value of a number using the math package. Here's an example:

package main

import (
	"fmt"
	"math"
)

func main() {
	num := -5
	absNum := math.Abs(float64(num))
	fmt.Println(absNum)
}

In this example, we use the math.Abs() function to calculate the absolute value of the num variable. Note that math.Abs() takes a float64 argument, so we need to convert the number to a float64 using float64(num) in order to use it. The result is then printed using fmt.Println().