1.2 programming fundamentals

This document discusses programming fundamentals related to variables in C programming. It covers data types, variable declaration and initialization, variable scope, and C keywords. Variables are named values stored in RAM during program execution. Variables can be declared globally or locally within functions. The scope of a variable determines where it can be accessed within a program. Different data types specify the size of memory reserved for a variable. C has reserved keywords that cannot be used as variable names.