Go If-Else Branching

Introduction

The if-else lab in Golang is designed to test your knowledge of branching with if and else statements in Go.

Skills Graph

if-else

You are required to complete the checkNumber function that takes an integer as input and returns a string. If the number is even, return "even", otherwise return "odd".

• The function should be named checkNumber.
• The function should take an integer as input.
• The function should return a string.
• If the number is even, return "even".
• If the number is odd, return "odd".

$ go run if-else.go
7 is odd
8 is divisible by 4
9 has 1 digit

## There is no [ternary if](https://en.wikipedia.org/wiki/%3F:)
## in Go, so you'll need to use a full `if` statement even
## for basic conditions.

There is the full code below:

// Branching with `if` and `else` in Go is
// straight-forward.

package main

import "fmt"

func main() {

	// Here's a basic example.
	if 7%2 == 0 {
		fmt.Println("7 is even")
	} else {
		fmt.Println("7 is odd")
	}

	// You can have an `if` statement without an else.
	if 8%4 == 0 {
		fmt.Println("8 is divisible by 4")
	}

	// A statement can precede conditionals; any variables
	// declared in this statement are available in the current
	// and all subsequent branches.
	if num := 9; num < 0 {
		fmt.Println(num, "is negative")
	} else if num < 10 {
		fmt.Println(num, "has 1 digit")
	} else {
		fmt.Println(num, "has multiple digits")
	}
}

// Note that you don't need parentheses around conditions
// in Go, but that the braces are required.

Summary

The if-else lab in Golang tests your knowledge of branching with if and else statements. In this lab, you were required to complete the checkNumber function that takes an integer as input and returns a string. If the number is even, return "even", otherwise return "odd".