如何在for循环中使用负值

Question

i am trying to get the sum of odd numbers with values starting from -300,000 to 300,000 and i am getting my result as ZERO can anybody help why?

var sum=0;
for(var i= -300000;i<=300000;i++){
    if(i%2!==0){
        sum=sum+i
    }
}
console.log(sum);

what is wrong with my code

Answer 1

Try this simplified code (with a bit a debug) to understand that there's just a math issue :

for (var i= -30;i<=30;i++){
    console.log('i == ' + i);
    if (i%2!==0) {
        sum+=i;
        console.log('sum is now ' + sum);
    }
}