How to calculate the greatest common divisor (GCD) of two integers in Go?

To calculate the greatest common divisor (GCD) of two integers in Go, you can use the math package's GCD function. Here's an example:

package main

import (
	"fmt"
	"math"
)

func main() {
	a := 24
	b := 36

	gcd := math.GCD(int64(a), int64(b))

	fmt.Println("GCD:", gcd)
}

In this example, we import the math package and then use the GCD function to calculate the GCD of two integers - a and b. The GCD function takes two int64 arguments and returns their greatest common divisor as an int64 value. We then print the result using the fmt.Println function.