function [doubleNumber] = doubleIt(x)

%Function: doubleIt
%Input: x, a number
%Output: doubleNumber, a number
%Purpose: Takes an input number (x), multiplies it by 2, stores it as
%doubleNumber and returns the number to the user
%Use: From command prompt you type 'doubleIt(x)' where x is a number
%Example: doubleIt(8) returns 16

doubleNumber = 2*x; %Notice that 'x' is never actually defined in the function,
                    %it is 'passed' to the function

%doubleNumber is the variable 'returned' by the fuction
%It is automatically returned based on the first line of the function

end