you pass variable(s) along to a new method without vs with variables.
parameter = same as variable in this context
NON-PARAMETERIZED (no variables) vs PARAMETERIZED (with variable(s))
Why do you have 2 types of methods?
Cuz, every variable in a method doesn’t exists in other methods!
Sometimes you need a variable in multiple methods. Then you can pass the variable along like this:
SUM = 20.
Because you don’t always need this you can also use a: NON-PARAMETERIZED method
More Information on:
for example how to write it and extra examples