Data Types: There are two data types in C programming language - (1)- Primary Data Types (2)- Secondary Data Types (1)- Primary Data Types : Primary data types are those data types which are defined already in the language. They can be used directly in the program. These data types one of the main important thing in C programming. There are mainly three types primary data types----- a)- int : For integer values range = -32767 to 32768 b)- float : For float values range = c)- char : For character values range = -127 to 128