While loop in Javascript - Mini Project: Build & Apply

Counting Down with a While Loop

📖 Scenario: Imagine you have a countdown timer for a game or event. You want to count down from a starting number to zero, showing each number as it counts down.

🎯 Goal: You will create a program that uses a while loop to count down from a given number to zero and print each number.

📋 What You'll Learn

Create a variable called count with the starting number 5

Create a variable called limit with the value 0

Use a while loop that runs as long as count is greater than or equal to limit

Inside the loop, print the current value of count

Inside the loop, decrease count by 1 each time

💡 Why This Matters

🌍 Real World

Counting down is useful in timers, games, and event reminders where you want to show time left.

💼 Career

Understanding loops is essential for programming tasks like automation, data processing, and controlling program flow.

1

Set up the starting number

Create a variable called count and set it to the number 5.

Javascript

// Your code here

Need a hint?

Use let count = 5; to create the variable.

2

Set the countdown limit

Create a variable called limit and set it to 0.

Javascript

let count = 5;
// Your code here

Need a hint?

Use let limit = 0; to create the limit variable.

3

Create the while loop to count down

Write a while loop that runs as long as count is greater than or equal to limit. Inside the loop, print the value of count and then decrease count by 1.

Javascript

let count = 5;
let limit = 0;
// Your code here

Need a hint?

Use while (count >= limit) { ... } and inside the loop use console.log(count); and count--;.

4

Display the countdown

Run the program to print the countdown numbers from 5 to 0.

Javascript

let count = 5;
let limit = 0;
while (count >= limit) {
    console.log(count);
    count--;
}
// Your code here

Need a hint?

Check the console output shows numbers from 5 down to 0, each on its own line.