What is C Data Type structure

C Data Type

In this you will learn basic data types such as int, float, char etc in C programming.

In C programming, data types are declaration of variables. This determines the type and size of data association with variables. 

For example :

Here, myVar, is a variable of int (integer) type.The size of int is 4 bytes.

Basic Data_types

Here's a table of containing commonly used types inn C programming for quick access.

Int

Integer are whole numbers that can have both zero, positive and negative but no decimal values.

For example :

we can use int for declaration an integers variables .

int a;

Here,  a is a variable of type integers.

You can declare multiple variables at once in C programming. 

For example :

int a , age;

The size of int is usually 4 bytes ( 32 bits ). And it can take 2 pow32.

Float and double

float and double are used to hold real numbers.

float salary;

double price;

In C floating-points numbers can also be represent in exponentional.

For example :

float normalization_factor = 22.442e2

What's the difference between float and double?

The size of float ( single precision float data type) is 4 bytes. And double ( double float precision data type ) is 8 bytes.                                                                                                                                        

Char             

Keyword Char is used for declaring character types variables.
For example 
char test = 'h' ;
The size of the character variable  is 1 byte.                                                                                              

Void 

void is an incomplete type. It means "nothing" or " no type". You can think  of void as absent.

For example :

If a function is not returning anything, its return type should be void.

Note that you cannot create variable void type.

Short Long

If You need to used a large number,you can use a specifier long. Here's Show below 

long a ;

long long b ; 

long double c ;

Here, a and b can store integer values. And C can store floating point number.

If you are sure, only a small integer  ( -32 , 767 ,+32 , -767 range) will be used, you can use short.

short b ;

You can always check the size of variable using the size of() operator.

Signed and unsigned

In C sign and unsigned  are the modifiers. You can alter the data Storage of data type by using them.

For example :

unsigned int  x ;

int  y ;

Here, the variable x can hold only zero and positive values because we have used unsigned modifiers.

 Considering the size of  int is 4 bytes, variable y can hold values from -2pow31 to -2pow31 -1, Where variable x can hold values from 0 to 2pow32 -1 

Other data_types in C programming are :

• bool type
• Enumerated type
• complex type

Derived Datatypes 

Datatypes that are derived from fundamental datatypes are derived types.
For example :
array, pointer., function types, structures etc.