01. knowledge about header file and why we use these library file in our code.

02. Knowledge about all the operators use in programming and using them frequently.

03. Data type and use of variables and keywords.

04. ASCII Value and it's conversions.

05. Input and Output.

06. Use of Some Library functions.

07. Mathematical library functions.

08. Doing math using C language.

09. If else; statement and how it works.

10. for loop and increment and decrement.

11. Swap numbers using temporary variable.

12. Conversion between small and capital letter with some sings using ASCII.

13. Finally, making a quiz game using if else Statement and Unary operator.