Data Types in C– Different type of data type in C

Data Types in C. In this tutorial, we will learn about data types and also learn how types of data types are and how to declare variables in C programming? We Will Also Learn How To Declare Variable In C Programming ? Improving start.

 Data types in C

• Before using variable and function in C programming, it has to declare.

• The data type specifies the type and nature of the variable and function, what type of data they can store and how much memory will occupy, meaning that the data type specifies the type of any variable in how much this variable memory location The space will occupy and what type of data will it store.

Types of Data type in C

• Data types in C programming are of the following types which are given below but generally data types are of two types 

*Basic data type and derived data type*

• Basic data type
• Derived data type
• Enumerated type
• Void data type

Data Types in C

Let us know about all these in details in detail.

Basic Data Type

This data type is the primary data type which represents the actual data in computer memory, which means which variable will be of what size, how much memory will occupy, they specify. Under the basic data type integer, floating-point and char type come. Let's explain all about one by one.

Integer (int)

Integer data type is used to store the whole number, it can store zero, negative and positive values ​​like 0, 3, 6, -7, -9, -120. It does not store data type decimal number (decimal number) such as 1.2, -2.3.

To declare the Integer variable int keyword

Is used. For example:  int a;

 

Here a is a variable name which is a variable of integer type. You can declare multiple variables in C programming. Comma is used to separate multiple variables. like:

int a, b, c;

The range of int data type is from -32768 to 32767 or -2147483648 to 2147483647. Its range varies according to different operating systems. Like there is different range for 32-bit operating system and different range for 64-bit operating system.

You can use the sizeof operator to know the size of any data type and variable on different platforms i.e. different operating systems. sizeof describes the size of your variable and data type in bytes. 

The following program describes how to find the size of int type. You can know the size of all data types by sizeof.

#include

int main() {

   printf("size of int type in bytes : %d /n “, sizedof(int));

  

   return 0;

}

Live Demo

When you compile and execute this program, this program will give you the output according to the architecture of your operating system. 

My operating system is of 64-bit architecture so it is providing 4 bytes 

answer.

Size of int type in bytes: 4

In the table below, the size and range of integer and character type are described.

Type	Storage Size	Range
char	1 byte	-128 to 127 or 0 to 255
unsigned char	1 byte	0 to 255
signed char	1 byte	-128 to 127
Int	2 bytes or 4 bytes	-32,768 to 32,767 or -2,147,483,648 to 2,147,483,647
unsigned int	2 bytes or 4 bytes	0 to 65,535 or 0 to 4,294,967,295
short	2 bytes	-32,768 to 32,767
unsigned short	2 bytes	0 to 65,535
long	4 bytes	-2,147,483,648 to 2,147,483,647
unsigned long	4 bytes	0 to 4,294,967,295

Floating-point types

Floating-point types are used to store real numbers such as 5.02, 5.364, -5.012 under this type float, double and long double data types. 

The size of the float data type is 4 bytes, the size of the double data type is 8 bytes, while the size of the long double data type is 10 bytes.

 All three types store different types of precision. Precision means digits after decimal.

The table below provides the details of the type, range, storage size and precision of the floating-point number.

Type	Storage Size	Range	Precision
float	4 bytes	1.2E-38 to 3.4E+38	6 decimal places
double	8 bytes	2.3E-308 to 1.7E+308	15 decimal places
long double	10 bytes	3.4E-4932 to 1.1E+4932	19 decimal places

char

char is used to store a single character. The single character is written within a single quote. The char keyword is used to define a variable of character type. The size of the character variable is 1 byte. Range from -128 to 127 or 0 to 255.

declaration of character type variable:

char first =’a’;

Derived data type in C

• Derived data type is used with the help of primary data type hence it is called derived data type. We Will Learn About All The Derived Data Types In Different Tutorials.

• Array type
• Pointer Type
• Structure type
• Union type

Void Data type in C

void data type does not return any type of value, meaning it specifies no value available. When we do not have to return any type of value from a function, we can specify the type of that function void.

Always keep in mind that you cannot declare the variable of type void.

  

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