Summary - Methods

Combine return, overloading and scope to write a math helper.

Summary: Methods

In this group you saw the basics of methods: static definition, returning values with return, void methods, overloading and scope.

A method does one job; when called, the flow enters it, and when done, it returns. With overloading you can reuse the same name with different parameters.

Now you will combine these to write a small calculator helper: define and use add, square and printResult methods.

Exercise Calculator helper

Define two methods: static int add(int a, int b) returns the sum; static void printResult(int r) prints Result: r. From main, call printResult(add(7, 8)).

Show example solution

static int add(int a, int b) { return a + b; }
static void printResult(int r) {
  System.out.println("Result: " + r);
}
// inside main:
printResult(add(7, 8));

Test yourself

What defines a method's signature?
- Return type and name
- Only the name
- Name and parameter types
- Body and return type
Show answer

Return type and name — Signature = name + parameter types; return type is not included.
Fill in the blank: call the method
```
int sum = add(3, ____);
```
Show answer
```
int sum = add(3, 4);
```
Match concept to explanation

return

Hands a value out
void

Returns no value
overloading

Same name, different signature
scope

Block where a variable is valid

Next lesson: Primitive parameters

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