Unsigned int reverse iteration with for loops

Question

I want the iterator variable in a for loop to reverse iterate to 0 as an unsigned int, and I cannot think of a similar comparison to i > -1, as

Answer 1

I can think the two options are either cast or singed numbers (can be done implicitly be comparing to -1, for example) or use the loop condition to check for overflow like this:

for(unsigned i=10;i>i-1;--i){ } // i = 10, 9, ... , 1
for(unsigned i=10;i+1>i;--i){ } // i = 10, 9, ... , 1,0

This loop will continue until i overflows (meaning that it reached zero). Note that is important that i iterates by 1, or you might end-up with an infinite loop.