What is wrong with this code guys?

Question

for(int i=0;i<10;i++){
int sum;
sum=sum+i;
}
System. out.println("sum is:" + sum); //I think problem is here na guys.

Answer 1

The problem is that you declare sum inside the for loop, it gets destroyed when it reaches the end of the for loop, thus sum does not exist outside the for loop.

You should declare sum before the for loop and initialize it to 0.