HW:
- create a function that take two numbers and return the sum of them
- create a function that take two numbers and return whether they can be divided by one another without a remainder.
- create a function that take a string (a single word) and capitalize the first letter and return the capitalized word.
- create a function that take a string (a couple of words) and capitalize the first letter of each word in the string and capitalized string.
- create a function that take two strings (parameter1 and parameter2), and return if parameter1 is a substring of parameter2.
- create a function (called isEven) that take a number and return whether it is even or not.
- create a function (called factorial ) that take a number and return the factorial of that number.