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Data type

 

What is Data Type?


A Data Type is something which describe about data nature. Data type tells the program that which type of value a Variable will hold and what type of mathematical, relational and logical operation can be performed on that variable without getting any error. If variable int x = 45, that means, 45 is integer value which is being kept in variable x and we could do mathematical operation on it.

There are basically 5 types of data types, when we are talking about c language.

Int, Float, Double, Long, char, Boolean, String, etc.

Few data types which we use often in c language is below:-

Int - Int defines as Integers. In int we can hold any numeric value. It occupies 4 bytes of memory. Keyword used for Integers value is int.

Float – Float defines as floating point number. It means we can hold any decimal number in it. It also occupies 4 bytes of memory. Keyword used for Float point values is float.

Double - Double data type is used for storing double precision floating point values or simply decimal values. Keyword used for double floating point data type is double. Double variables typically require 8 byte of memory space.

Long – Long also holds the integers value. It occupies 8 bytes of memory. Keyword used for Long is long. It is basically use when you have large number to store in variable.

Character – Character data type hold the alphabet or any character value in it. Keyword used of Character is char. Character requires 1 bytes of memory space.

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