C++ Fundamentals · Functions · Lesson 15 of 24
Function Overloading
Concept
Function Overloading
C++ lets you define multiple functions with the same name but different parameter types or counts.
By the end of this lesson
- Explain the core idea behind Function Overloading.
- 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.
ExampleRunnable
int add(int a, int b) { return a + b; }
double add(double a, double b) { return a + b; }Self-check before continuing
Without looking at the example, describe what changes when you modify one input in Function Overloading. 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
Overload a function greet() to accept either no arguments or a name string.
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Console