# C program to find sum of even numbers from 1 to n

### Overview

In this post, we will develop a C program to find the sum of even numbers from 1 to n. To find the sum of even numbers we need to iterate the numbers from 1 to n.

### C Program

#include int main() { int n; //initialize sum variable int sum = 0; int i = 2; printf("Please input the number n:"); scanf("%d",&n); while (i <= n) { sum = sum + i; i =i + 2; } printf("Sum of even numbers from 1 to n is:= %d\n", sum); return 0; }

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To find the sum we have initialized a variable sum to 0. We accumulate the sum of the even numbers from the range 1 to n.

To get the even number we will start with the 2 and in each iteration

we will increment the i variable with 2.

i = i + 2;

### Sample Output

Please input the number n:15

Sum of even numbers from 1 to n is:= 56

The IDE used in the tutorial is Code:: Blocks.

To download and install Code Blocks follow the link:**https://www.testingdocs.com/download-and-install-codeblocks/**

For more information on Code Blocks IDE, visit the official website of Code blocks IDE: **http://www.codeblocks.org/**