Question

How to sum the first N even numbers in C

Answer 1

#include <stdio.h>

int main() {
    int n = 7;
    int even = 0, sum = 0;
 
    for (int i = 0; i < n; i++) {
        sum += even;
        printf("%i ", even);
        even += 2;
    }
    printf("\nsum = %i", sum);
}



/*
run:

0 2 4 6 8 10 12 
sum = 42

*/

 

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