Data types in c language

Data type in c language

In c language data type provide declaration of variable determines size of data that are assigned by a variable.

In c language there are two different data types

1. Primary data types
2. Derived data types

Description

Data type in c language

1. Primary data types: there is main three primary data types
   1. 1. integer(written in program as int)
   2. 2. floating point(written in program as float)
   3. 3. character data types(written in program as char)
   4. 4. and one is void data type(this data type is non return value data type it means it execute program in own function it cannot return value to another function example is void main() is a main function where from start the program)

Type	Size(bytes)	Range
int or signed int data type	2 bytes	Between -32,768 to 32767
unsigned int data type	2 bytes	Between 0 to 65535
short int or signed short int data type	1 bytes	Between -128 to 127
unsigned short int data type	1 bytes	Between 0 to 255
long int or signed long int data type	4 bytes	Between -2,147,483,648 to Between 2,147,483,647
unsigned long int data type	4 bytes	Between 0 to 4,294,967,295
Type	Size (bytes)	Format Specified
Int data type	at least 2, usually 4	%d, %i use for input integer value and output integer value

2. float data types

Type	Size(bytes)	Range
Float (floating point data type)	4 bytes	Between 3.4E-38 to 3.4E+38
double (floating point data type)	8 bytes	Between 1.7E-308 to 1.7E+308
long double (floating point data type)	10 bytes	Between 3.4E-4932 to 1.1E+4932
Float in c language		%f code is use to input value and print value
double		%lf code is use to input value and print value
long double		%Lf code is use to input value and print value

3. Character data types in c language

char or signed char in c language	1	-128 to 127
unsigned char in c language	1	0 to 255
signed char in c language	1	%c code is use to input character value and print character value

4. Void data type means no value return type of function

Such as example

#include<stdio.h>

#include<conio.h>

Void main()

{

Program code…

getch();

}

Int type return a integer value in function

Such as example

#include<stdio.h>

#include<conio.h>

int main()

{

Program code..

return 0; //this return statement must be included when you use int in main function.

}

• Derived data types

In derived data type array, pointer, function, structure etc. are used.

We will learn about derived data types in later post when we use array program, how to create array program, what is pointer in c language, use of c language pointer, what is function in c language, types of function in c language, how to define a function in c language, what is structure in c language, how to create structure program in c language, etc…

Some example of primary data types

Use of integer data types

int a, b;

syntax:

datatypes variable_name

floating points datatypes

float marks;

double salary;

syntax:

datatypes variable_name

character datatypes

char grade = ‘A’;

syntax:

datatypes variable_name = ‘value’

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