For loop as while in Go - Mini Project: Build & Apply

Using For Loop as While in Go

📖 Scenario: Imagine you want to count how many times you can subtract 3 from a number until it becomes less than or equal to 0. This is like checking repeatedly with a condition, similar to a while loop.

🎯 Goal: You will write a Go program that uses a for loop as a while loop to count how many times 3 can be subtracted from a starting number.

📋 What You'll Learn

Create a variable number with the value 20

Create a variable count initialized to 0

Use a for loop with a condition to subtract 3 from number until it is less than or equal to 0

Increase count by 1 each time inside the loop

Print the final value of count

💡 Why This Matters

🌍 Real World

Using loops with conditions is common when you want to repeat actions until something changes, like counting down time or processing items until none are left.

💼 Career

Understanding how to use loops as conditions is important for writing efficient and clear code in many programming jobs, especially when working with Go.

1

Create the starting number variable

Create a variable called number and set it to 20.

Go

// Create a variable called number and set it to 20
// Your code here

Need a hint?

Use number := 20 to create the variable.

2

Add a counter variable

Add a variable called count and set it to 0 below the number variable.

Go

package main

func main() {
    number := 20
    // Create a variable called count and set it to 0
    // Your code here
}

Need a hint?

Use count := 0 to create the counter variable.

3

Use a for loop as a while loop

Write a for loop with the condition number > 0. Inside the loop, subtract 3 from number and add 1 to count.

Go

package main

func main() {
    number := 20
    count := 0
    // Use a for loop with condition number > 0
    // Inside the loop subtract 3 from number and add 1 to count
    // Your code here
}

Need a hint?

The for loop in Go can be used like a while loop by giving only a condition.

4

Print the count

Add a fmt.Println(count) statement to print the value of count. Remember to import the fmt package at the top.

Go

package main

import "fmt"

func main() {
    number := 20
    count := 0
    for number > 0 {
        number -= 3
        count += 1
    }
    // Print the count
    // Your code here
}

Need a hint?

Use fmt.Println(count) to show the final count.