# How to Get Sum of Series 1+2+3+4+5+…. +n in C Program

It is easy to get sum of series 1 + 2 + 3 + 4 + . . . + n in C program. In this tutorial, I’ll show you how to do it in easy way in C program. Here is a simple code for it:

```#include <stdio.h> #include <conio.h> void main() { int n,i; int s=0; printf("Enter the value of n of the series: "); scanf("%d",&n); s = (n * (n + 1)) / 2; printf("Sum of the series: "); for (i =1; i <= n; i++) { if(i==n) printf("%d = %d ",i,s); else printf("%d + ",i); } getch(); }```

Output:
``` Enter the value of n of the series: 10 Sum of the series: 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55 ```

In above code, I have sum up the series with a equation first. Then, I have tried to show number, plus sign, result and in a word equation  by iterating from 1 to n using for loop.

In this tutorial, I have shown how to get sum of series 1+2+…. +n in C Program. Hope you have enjoyed the tutorial. If you want to get updated, like the facebook page http://www.facebook.com/freetechtrainer and stay connected.