Keywords in C
Note: All the keywords must be written in lower case.
Constants : Any unchanged value in a program during the program execution is called constant.
There mainly two types of Constants in C language.
Numeric Constants :
There are two types of numeric constants.
(i) Integer Constant
(ii) Real or floating point constant
(i) Integer Constant : An integer constant is a signed or unsigned whole number.
Example : -25, +25
(ii) Real or floating point constant : Any signed or unsigned number with fractional part is called real or floating point constant. A real constant can be written in decimal or exponential form.