C language: Introduction of Data types and Pointer

Introduction of Data types and Pointer

1. Pointers

2. Data Types in C Data Type Memory Use Example int 4 bytes Stores integers int age = 25; float 4 bytes Stores decimal numbers float height = 5.9; double 8 bytes Stores large decimal numbers with higher precision double pi = 3.14159; char 1 byte Stores single characters char grade = 'A'; short 2 bytes Stores smaller integers short count = 150; long 4 or 8 bytes Stores large integers long population = 7000000000; unsigned int 4 bytes Stores only positive integers unsigned int score = 95; bool 1 byte (varies) Stores true or false values _Bool isDone = 1; (C99 and later)

3. Integer

4. Float and Double

5. Precise output with “\n”

6. Adjusting the decimal value

7. Char

8. Characters are internally stored as integers

9. Size of operator

10. Pointer

11. Base address 1002