Write a C program to find the sum of first n even numbers.
int main() {
int n, count = 0, i = 1, sum = 0;
/* get the input from the user */
printf("Enter the value for n:");
scanf("%d", &n);
/* calculate the sum of first n even numbers */
while (count < n) {
if (i % 2 == 0) {
sum = sum + i;
count++;
}
i++;
}
/* print the sum of first n even numbers */
printf("Sum of first %d even numbers is %d\n", n, sum);
return 0;
}
Output:
jp@jp-VirtualBox:~/$ ./a.out
Enter the value for n:5
Sum of first 5 even numbers is 30
Enter the value for n:5
Sum of first 5 even numbers is 30
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