#include <stdio.h>/* Function to calculate sum of even numbers from 1 to n */int sumOfEven(int n) {int sum = 0;for (int i = 2; i <= n; i += 2) {sum += i;}return sum;}int main() {int n, result;/* Input */printf("Enter an integer: ");scanf("%d", &n);/* Function call */result = sumOfEven(n);/* Output */printf("Sum of even numbers from 1 to %d = %d\n", n, result);return 0;}
