Challenge 20 - Finding the nth Triangular Number

In this challenge, you are going to implement the TriangularNumbers function which takes in n and returns the nth triangular number.

n = 1
result = 1

n = 3
result = 6

See the Solution

Feel free to have a look at the forum discussion thread for this challenge and contribute with your own solutions here - Challenge 20 - Triangular Numbers

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