Is if(TRUE) a good idea in C?

Question

In the C programming language, it is my understanding that variables can only be defined at the beginning of a code block, and the variable will have the scope of the block it w

Answer 1

C99 allows you to declare variables almost anywhere. However, refrain from doing it without a very good reason. Try first to split your function into smaller (possibly inline) functions.

The only place where such a thing might make sense is when you have a variable that is initialized in the middle of your function, e.g. similar to creating an object in C++.