Thread: Simple loop clarification

I was given a couple pieces of code that don't make any sense to me. I was hoping you could explain where my comprehension fails.

Code:

int row = 0, col = 0;
 
     while(row++ < 10);{
          printf("row = %d\n",row);
     }

It seems like it should print out
row = 0
...
row = 10

But it prints out "row = 11". Why?

Code:

  int row = 0, col = 0; 
     for(row = 0; row < col; row++); {
          printf("Row = %d\n",row);
     }

And this shouldn't run at all, because row is not less than col, but it does. Why?

OOOOOHHHHHH!!! No wonder! Thank you!