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Thanks. The reason I was confused was because the sum=a[i][j] in the for loop. Usually for loop only has a intialization, condition and increment but not the first term. Anyways, thanks !

Can you explain more on that ? Sorry I am new to C++.

So would it be


for (k=i-1; k>=0; k--) {
sum=a[i][j]
sum -= a[i][k];
}

Hi I am not quite sure what this for loop means


for (sum=a[i][j], k=i-1; k>=0; k--) sum -= a[i][k];

Why is there a sum=a[i][j] in the for loop ? Is it initiated every single time or how does...