Source Code: https://github.com/bulentsiyah/GCF-and-LCM-Calculator-Swift-Application
Xcode Version 8.1
The greatest common factor
The greatest common factor, or GCF, is the greatest factor that divides two numbers. To find the GCF of two numbers:
List the prime factors of each number. Multiply those factors both numbers have in common. If there are no common prime factors, the GCF is 1.
The Least Common Multiple
A common multiple is a number that is a multiple of two or more numbers. The common multiples of 3 and 4 are 0, 12, 24, ….
The least common multiple (LCM) of two numbers is the smallest number (not zero) that is a multiple of both.