For loop with step and downTo in Kotlin - Mini Project: Build & Apply

For loop with step and downTo in Kotlin

📖 Scenario: You are organizing a countdown event and want to display numbers counting down with a specific step.

🎯 Goal: Build a Kotlin program that counts down from 10 to 1, stepping by 2, and prints each number.

📋 What You'll Learn

Create a variable called start with the value 10

Create a variable called end with the value 1

Use a for loop with downTo and step to count down from start to end by 2

Print each number inside the loop

💡 Why This Matters

🌍 Real World

Counting down with steps is useful in timers, animations, and game loops where you want to skip certain numbers.

💼 Career

Understanding loops with steps and counting down is important for writing efficient code in many programming jobs, including app development and automation.

1

Create start and end variables

Create a variable called start and set it to 10. Create another variable called end and set it to 1.

Kotlin

# Create variables start and end
// Your code here

Need a hint?

Use val to create variables and assign the numbers 10 and 1.

2

Write a for loop with downTo and step

Write a for loop using i as the loop variable that counts down from start to end using downTo and steps by 2 using step.

Kotlin

val start = 10
val end = 1

// Write a for loop counting down from start to end by 2
// Your code here

Need a hint?

Use for (i in start downTo end step 2) to count down by 2.

3

Print each number inside the loop

Inside the for loop, write println(i) to print each number.

Kotlin

val start = 10
val end = 1

for (i in start downTo end step 2) {
    // Print each number
    // Your code here
}

Need a hint?

Use println(i) inside the loop to show each number.

4

Run the program to see the countdown

Run the program to print the countdown numbers from 10 to 1 stepping by 2.

Kotlin

val start = 10
val end = 1

for (i in start downTo end step 2) {
    println(i)
}

// Run the program to see output

Need a hint?

The program should print numbers 10, 8, 6, 4, and 2 each on a new line.