Often in programming we are interested in dealing with collections of data. In the post Investigating Basic Combinatorics, we looked at the very basics of calculating how many unique combinations of objects we could create with finite choices of objects. Today, we are going to look at putting these combinations together. Let’s start with a…

# Articles from February 2016

## Investigating Basic Combinatorics

In programming and in math we are often interested in how many possible combinations of objects exist. For example: how many 5-hand cards can be made from a 52-card deck? In mathematics these are referred to as combinatorics problems. Many basic combination problems can be evaluated with the formula: The formula is verbally stated as…

## Finding Divisors And Prime Factors

Finding Divisors A divisor (D) of a number (N) is an integer that divides another integer with no remainder. In other words N mod D = 0. Sometimes, we are interested in finding all divisors of a number. If we are considering a programming solution to this problem, chances are we are dealing with very…

## Prime Number Testing

A prime number (or a prime) is defined as a positive integer greater than 1 that has no positive divisors other than 1 and itself. If I wanted a programmatic test that a number is prime, my first instinct in C# would look something like this: static bool IsPrime(int number) { for(int i = 2;…