1. Methods/Functions

2. What is a method? A named section of code
Code reuse: Write once, run it many times
In Java all methods are part of classes
Static methods can be called without declaring an object of the class first.

4. Function calling
Prompt this code to run by calling the function.

5. Detailed description about how to use a word
I want to sing the chorus
Their 'songs' are structured by contrasting textures and energies rather than verses and choruses
Use word in separate text
Refer to a word without its whole definition
Detailed description about how to use a word
Function Call
Function Definition
Use function in separate program.
Refer to it by name
Detailed code.
How to use the function if it returns value
public static void main(String[] args) {
// TODO Auto-generated method stub
chorus(); }
private static void chorus() {
// TODO Auto-generated method stub }

6. Parameters and Arguments
Parameters: Variables in the parentheses of our function, that we can then use inside our function.
Arguments: Specific values passed into our function call (ex. “Tony”)
When you call a method, the arguments used must match the declaration's parameters in type and order.

7. Argument Order printPhoto (10,20,false); printPhoto (20,10,false);
Matching the argument with the type of the parameters. Keep in mind that the order and type are very important. When you use multiple parameters and put arguments in a function call.

8. Return values Function Input output Parameters Return values
Defined by return type
Not only functions can take the input as parameters, they can also return data to you. This data is called return values of this function. Void means not returning any data
Printing does not create output that we can interact with later on in separate programs. Done in internal code.
public void functionName() {
//internal block of code }
In order to return values, changing the void to int, String, Boolean etc.

9. Demo
Calculate the area and perimeter of a rectangle.

10. Return values To return a value you need:
A return type - void, int, String, etc
A return statement -- line of code that returns a value
Return values let you use values in other function calls or programs !

11. Demo
Methods working with Array