What are data types?

Answer 1

Think of data type like kind of great container that contains numbers(integer/float/double) text(phrase/characters).User in many programming language must indicate the data type firstly for each variable he declare.In other lang there are no need to declare explicitly the data type.

Answer 2

data types are the type of data that you want to store in a variable.
We can categorize data type into two parts.

Primitive data type: Those are basic data types.

Usually there are 3 basic data types
int - stores integer data.
float /double - stores fraction.
char - stores character.

Abstruct/derived data type: Those data types are made by the help of Primitive data types.

Eg. Array.

Data types determines type & size of the data stored inside a variable.