CS Methods

Argument

An argument is the data sent to a method. The data type of the argument must match the data type of the parameter.

Return Method

Returns only 1 value at a time As soon as Java encounters a return statement, it returns the value to the calling method and ignores any code after the return statement. For that reason, we don't need an else statement in the method above, because Java will never consider the second return statement if a is greater than b. The "int" marker in the method header indicates that the return type of the method is "int". That means that the value it sends back will be an int.

How to catch a return value?

Store it in another variable print it boolean condition

method decomposition

The job of breaking a problem into smaller problems and writing methods for each sub-problem key part of the programming process for developers.

parameter

a local variable in a method header that holds the data sent in. The data type of the parameter makes a huge difference in what the method can do As many as you need Any combination of data types Values are from main (or the method calling the method) The values being sent in are called arguments or actual parameters to distinguish them from the formal parameters of the method

When a class type parameter is passed to a method in Java, ______.

all changes are saved because a copy of the reference to the memory address is passed

When this type of variable is passed into a method, any changes made to it in the method are saved and the previous value of the variable is overwritten outside the method.

class

What is an example of a void method?

public static void main (String[] args)

When you pass an array to a method, the method receives ______.

the reference to the array

preconditions

we need to be aware of what can sensibly be passed into a method

postconditions

what will be the likely results.