4.1 Introduction to C Data Types

• Whenever you create a variable, before that, the compiler tells you what kind of data you store in that variable. 
• This gives the compiler the same memory allot from that of the memory of the computer.

/* A Integer type variable */ int age;

• The statement given above tells the compiler that you are going to store a whole number (without a decimal) in age variable. 
• The amount of memory required to store any whole number is equal to the compiler as it allot for this variable. Which is 2 bytes.
• If there are no data types in a programming language, then there may be a lot of memory waste. 
• When you need 2 bytes then you can waste 20 bytes. 
• Therefore, for any type of data you can store, the maximum memory limit has already been defined for it.

Different C Data Types :

❖ C language supports 3 types of data types. These are also called primitive types.

❖ Integer Type

• int
• short int
• long int
•  signed int
• unsign int

❖ Floating Point Type

•  float
• double

❖ Charcter Type

• char
• Void