Java Fundamentals · Variables & Data Types · Lesson 6 of 22
Type Casting
Concept
Type Casting
Casting converts a value from one type to another, such as an int to a double, using parentheses around the target type.
By the end of this lesson
- Explain the core idea behind Type Casting.
- 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. Read one concept.
- 2. Change the example.
- 3. Run, compare, and explain.
- 4. Complete the challenge below.
Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Type Casting. 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
Cast an int to a double before dividing it by another int to get a decimal result.
Need a nudge?
Ask about this lesson or your next move. The guide explains the path without taking the work away from you.
Ready for the next lesson?
Mark this lesson complete when you have finished the exercise.
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