Meaning of this for-loop written ina mex file

Hi,

Can someone please shed some light about this particular for-loop that I came across.

for(ir = ir; ir<=temp; ir++){ }

The initial value seems to equal to each other !. What is the meaning of that ?

Answer 1

[Jan]

It is simply a bad programming style. The "ir = ir" can be omitted:

for( ; ir <= temp; ir++) { }

Answer 2

[Kasun Talwatta]

I found that it basically does ir = max(ir, ceil(temp)) thanks to a member from stackoverflow

[James Tursa]

Or an infinite loop. E.g. if ir is unsigned and temp is the max value (or greater) for that unsigned type, or if ir is a signed integer type and the compiler uses modulo arithmetic for signed integer overflows and temp is the max value (or greater) for that type, etc. etc.