Find sum of iterations of variable in for loop

Question

for (i = 0; i <= 1000; i++) {
    if ( i % 3 === 0){
        console.log(i);
    }
    if ( i % 5 === 0){
        console.log(i);
    }

}

I wan

Answer 1

If you want to avoid counting multiple of 15 twice in your sum :

int sum = 0;
for (i = 0; i <= 1000; i++) {
    if ( i % 3 === 0 ||  i % 5 === 0){
        sum += i; // or sum = sum + i
    }
}