What the heck is "Preprocessor directive" in C++?

Feb 2, 2025 · 4 min read · 💡 tl;dr - certain action is done by pre-processor before actual complilation of source code. The goal is to share: what is Preprocessor Directive in C & C++ and what are the different ways we use it. I’m writing this ‘blog’ today 2 February 2025 b...