
3.6 Basics of C Programming
The basic source character set of C language includes:
1. Letters:
a. Uppercase letters: A, B, C, …, Z
b. Lowercase letters: a, b, c, …, z
2. Digits: 0, 1, 2, …, 9
3. Special characters: , . : ; ! ” ^ # % ^ & * ( ) { } [ ] < > | \ / _ ~ etc.
4. White space characters:
a. Blank space character
b. Horizontal tab space character
c. Carriage return
d. New line character
e. Form feed character
3.5 Identifiers and Keywords
If you know C’s source character set, the next step is to write identifiers. This is analogous to
writing words in a natural language.
3.5.1 Identifiers
An identifier refers to the name of an ...