C program to find sum of first n even positive numbers ?
Sol.
/**
* C program to print the sum of first n even positive numbers
*/
#include <stdio.h>
int main()
{
/* Even numbers are integers */
int count, n, sumOfEvenNum=0;
/* First positive even numbers starts from 0 and end at n. */
printf("Enter positive value of n : \n");
scanf("%d", &n);
/* Find the sum of first n even positive numbers */
/*Positive even numbers are 0, 2, 4, 6....
* So increment count by 2 each time */
for(count=0; count<=n; count=count+2)
{
sumOfEvenNum = sumOfEvenNum + count;
}
printf("Sum of first n even numbers = %d", sumOfEvenNum);
return 0;
}
Output :
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