types of constants...

[Neha]

how many types of constants are there in C language?

[akanksha shukla]

I think
primary toh 3 hote hai ---- int float char
secondary - array structure union enum
wats d actual ans?

[TheSuyog]

int, float & char and array, struct, union & enum are primary and
secondary "data types" respectively not constants.

Types of constants are:

1. Integer constants: ordinary integer numbers including decimal
(1234), octal and hexadecimal (0x1234) representations,

2. Floating point constants,

3. Character constants,

4. String constants: actually arrays of characters ("Hello").

These are actually the literal values that we assign to a variable.
Ex.: int a = 123; here int is data type, a is variable name, and 123
is integer constant.
Similarly for char a = 'a';
float a = 1.234;
char a[] = "asdf"; or char a[] = {'a', 'b', 'c'};