C programming Cheat Sheets 

1. Introduction to C Programming

- Definition and History

- Features of C Programming

2. C Program Structure

- Basic structure of a C program

- Preprocessor directives, global declarations, and main function structure

3. Keywords and Character Set

- List of C keywords (32 keywords)

- Valid alphabets, digits, and special symbols used in C

4. Rules for Writing, Compiling, and Executing C Programs

- Case sensitivity and naming conventions

- Statement terminators and variable declaration rules

5. Data Types and Placeholders

- Basic built-in data types

- Examples of variable declarations and usage

6. Arrays

- Array declarations and initializations

- Accessing and entering data into arrays

7. Functions

- Importance of functions in modular programming

- Function arguments and return values

8. File Handling

- Using file pointers

- Opening files and modes of file operations

Basic Structure of a C Program: Organization and syntax.

Preprocessor Directives: Use of #include for libraries.

Main Function: Entry point of the program.

Comments: Single-line and multi-line comments.

Input/Output Functions: Usage of printf() and scanf().

Data Types: Basic, derived, and user-defined types.

Keywords: Reserved words in C.

Variables: Declaration and naming rules.

Strings: String handling and functions.

Structures and Unions: User-defined data types and examples.

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