function

A function is a reusable piece of code that performs some logic and gives you a result

 

The return keyword allows the function to give the result of its computation.

 

return keyword can only be used inside a function.

 

A parameter is a variable that a function receives.

 

Most functions will use that variable they receive and will compute the result based on it.

 

To call a function, you have to start with its name, then opening parentheses (, then the value you want to give to the parameter, and then a closing parenthesis ).