This is in C

2. Create a program that calculates and displays the first n numbers from the Triangular number series: (Chalenge: Can you display the dots using printf) function?) Triangular Number The triangular number Ta is a figurate number that can be represented in the form of a triangular grid of points where the first row contains a single element and each subsequent row contains one more element than the previous one. This is illustrated above for T 1, T- The triangular numbers are therefore 1, 1 +2,1+2+31+2+3+4.. so for are 1, 3, 6, 10, 15, 21.. More formally, a triangular number is a number obtained by adding all positive integers less than or equal to a given positive integer ", i.e. n(n1 n+1 Taken from: http:l/mathworld wolfram.com TriangularNumber.html