Project Euler, problem 1 solution

Problem 1

Stupid brute force, not masterpiece, which is generally not suitable on really large numbers. But it is easy.

JavaScript (Spider Monkey)

var num = 1000, sum = 0, res = 0;
while(num--){
    if(!(num%3) || !(num%5))
        res += num;
}
print(res);

// time: 0.02s memory: 4984 kB