System Prompts and Guardrails in AI modelsAt this point, you already understand two major stages in the life of an AI system. First: the model learns language patterns through pretraining Then: the model is shaped into a helpful assistant May 26, 2026·9 min read
The Mathematical Core of AI — Weights, Temperature, and Why AI Responses ChangeMay 13, 2026·8 min read
How AI Understands Words (Embeddings)When you type something into an AI system, the computer does not see words the way you do. You see meaning. The computer sees symbols. So before AI can do anything useful with language, it has to convMay 13, 2026·8 min read
Preprocessor in Practice (Real Use Cases + Project Thinking)In the previous lessons, you learned: What the preprocessor is How #include and #define work How macros and conditional compilation behave Now we bring everything together. How is the preprocessApr 1, 2026·5 min read
Macros & Conditional Compilation (How the Preprocessor Really Works)In the previous lesson, you learned: What the preprocessor is How #include works How #define replaces text Now we go deeper. This lesson is where things become powerful (and a bit tricky): MacroApr 1, 2026·4 min read
What is the Preprocessor? (What Happens Before Compilation)So far, you’ve been writing C programs like this: #include <stdio.h> int main(void) { printf("Hello, world!\n"); return 0; } You write the code → compile → run. Simple. But here’s something Apr 1, 2026·4 min read
main Function Variants, Unused Variables & Real-World Use CasesSo far, you’ve learned: How programs receive input (argc, argv) How to access and process arguments Now we complete the picture. This lesson answers three important questions: Why does main someApr 1, 2026·4 min read
Working With Command-Line Arguments in PracticeIn the previous lesson, you learned: What command-line arguments are What argc and argv mean How programs receive input from the terminal Now we move to the practical side: How do we actually usApr 1, 2026·4 min read