Why does a for loop with a semicolon after it still execute?

Question

I was having a look at some code a friend did and stumbled across this line which I thought was an error (simplified for example)..

for (g = 0; 10 > g; g+         


        

Answer 1

The semi colon actually runs the loop without the {} code block. So your code basically has 2 parts,

1. update variable g to from 0 to 10 in 10 steps,
2. print out g (now equals to 10) once.