Fields are the data of a type(class) while the methods define the behaviours.
A method contains a series of statement.
A method can also get input from outside by declaring parameters and output to outside by returning value.
The void return type indicates that no value will return from the method.
A method's signature is its name and parameters' type.
A method's signature must be unique within its type(class).
A method can have the following modifiers:
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