Golang React JS Technology Blog

Simple function with return value in Golang

In this example, the add() function takes input of two integer numbers and returns an integer value with a name of total.

Note the return statement is required when a return value is declared as part of the function's signature.

The types of input and return value must match with function signature. If we will modify the above program and pass some string value in argument then program will throw an exception "cannot use "test" (type string) as type int in argument to add".

Example

package main

import "fmt"

// Function with int as return type
func add(x int, y int) int {
	total := 0
	total = x + y
	return total
}

func main() {
	// Accepting return value in varaible
	sum := add(20, 30)
	fmt.Println(sum)
}
Most Helpful This Week
Higher Order Functions in Golang The return values of a function can be named in Golang Anonymous Functions in Golang Golang Functions Returning Multiple Values Creating a Function in Golang User Defined Function Types in Golang Simple function with parameters in Golang Closures Functions in Golang Golang Passing Address to a Function What is Function in Golang Naming Conventions for Golang Functions