C language supports following types of data types:

• Primary Data Types
  • void : It specify no values.
  • char : A single character is store in ‘char’ datatype belonging to the defined character set of C language.
  • int : It store a numeric value in it e.g: positive or negative integer.
  • float : Float stores numeric fixed value as well as decimal value up to six points.
  • double : It stores real numeric value with double precision.

• Composite Data Types
  • Array : It is a Collection of homogeneous data.
  • Pointer : It stores the address of any memory location.
  • Structure : It collect the variables of different types.
  • Union : It collect a different variables sharing common memory space.