(_) Blank Identifier(underscore) in Golang?

What is Blank Identifier(underscore) in Golang?

What is Blank Identifier(underscore) in Golang? - GeeksforGeeks

// Golang program to show the compiler

// throws an error if a variable is

// declared but not used

package main

import "fmt"

// Main function

func main() {

// calling the function

// function returns two values which are

// assigned to mul and div identifier

mul, div := mul_div(105, 7)

// only using the mul variable

// compiler will give an error

fmt.Println("105 x 7 = ", mul)

}

// function returning two

// values of integer type

func mul_div(n1 int, n2 int) (int, int) {

// returning the values

return n1 * n2, n1 / n2

}

./prog.go:15:7: div declared and not used

// Golang program to the use of Blank identifier

package main

import "fmt"

// Main function
func main() {

	// calling the function
	// function returns two values which are
	// assigned to mul and blank identifier
	mul, _ := mul_div(105, 7)

	// only using the mul variable
	fmt.Println("105 x 7 = ", mul)
}

// function returning two
// values of integer type
func mul_div(n1 int, n2 int) (int, int) {

	// returning the values
	return n1 * n2, n1 / n2
}