Modulo

Fizzbuzz

Go supports the standard modulo operator:

7 % 3 // 1

The AND logical operator:

true && false // false
true && true // true

As well as the OR operator:

true || false // true
false || false // false

Assignment

We're hiring engineers at Textio, so time to brush up on the classic "Fizzbuzz" game, a coding exercise that has been dramatically overused in coding interviews across the world.

Complete the fizzbuzz function that prints the numbers 1 to 100 inclusive each on their own line, but replace multiples of 3 with the text fizz and multiples of 5 with buzz. Print fizzbuzz for multiples of 3 AND 5.

This lesson is graded based on the output of your program, so don't leave any debugging print statements in your code.

Solution

Key Go Concepts Used

• for loop (Go’s only looping construct)

• Modulo operator %

• Logical AND &&

• Conditional branching (if / else if / else)

• fmt.Println() for line-by-line output

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Correct & Idiomatic Go Solution

fizzbuzz.go

package main

import "fmt"

func fizzbuzz() {
	for count := 1; count <= 100; count++ {
		if count%3 == 0 && count%5 == 0 {
			fmt.Println("fizzbuzz")
		} else if count%3 == 0 {
			fmt.Println("fizz")
		} else if count%5 == 0 {
			fmt.Println("buzz")
		} else {
			fmt.Println(count)
		}
	}
}

func main() {
	fizzbuzz()
}