RivoCode

Java Fundamentals · Loops · Lesson 13 of 22

for Loops

Concept

for Loops

A for loop repeats a block a fixed number of times, controlled by an initializer, a condition, and an increment.

By the end of this lesson
  • Explain the core idea behind for Loops.
  • Predict output before running a change.
  • Test one realistic and one unusual input.
  • Use the result to make the next decision.
How to study this page
  1. 1. Read one concept.
  2. 2. Change the example.
  3. 3. Run, compare, and explain.
  4. 4. Complete the challenge below.
ExampleRunnable
for (int i = 1; i <= 5; i++) {
    System.out.println(i);
}
Try it Yourself »
Self-check before continuing

Without looking at the example, describe what changes when you modify one input in for Loops. Then reopen the editor and prove your explanation with a small test.

You are ready to continue when you can predict, test, and explain the result.

Your turn

Use a for loop to print the numbers 10 down to 1.

Loading editor…

Console

Output will appear here...