1) The C character Set
"A character is any alphabet,symbol, digit which is used to represent information." Each programming language has a set of valid character that it can understand. Following table shows valid characters in C
2) Constants and Variables
It is a time to recall your algebra class. Digits like 1,2,3.... whose value remains constant are called constants.
Whereas we used alphabets like x,y,z are called variables
- Constants : It is a entity that does not change.
- Variables : It is the entity that does change.
3) Types of constants
C constants can be divided into two types:
- Primary constant
- Secondary constants
See the figure below:
These basics are must for you to understand so that you can perform your programming easily and effectively.