If you use the wrong comparison with the loop control variable, the body of the loop may never execute.

What is the output of the following code fragment?

int f1(int x, int y) { if(x<0 || y<0) return x-y; else return f1(x-1,y) + f1(x,y-1); } int main() { cout << f1(2,1)<

When you sort data contained in columns of a worksheet, Excel includes the column headings.

Answer the following statement true (T) or false (F)