0 What is data type in C?

Data types are the means to identify the type of the data and associated operations for handling it. In other words, data types means type of data , a variable can hold and associated operations can be performed on it. Data type also provide the information regarding the type of the value and range of the value of that type, the variable can have.

For example, 

  int a;

Above statement tells that variable 'a' can hold integer value falling within the range of integer.