C Tutorial

C Data Types

C Data types

Following are the different predeined data types available in c programming,

data type	size	format code	Description
int	2 bytes	%d	integer (number)
long	4 bytes	%ld	long integer (number)
char	1 byte	%c	character (single character)
float	4 bytes	%f	floate (decimal values)
double	8 bytes	%lf	double (long decimal values)
string	-	%s	string (multiple characters)

C Program for using different data types

This c program is the example of using different data types available in c programming language.

Each data type, variable is declared, defined value and displayed in the output using printf function.

#include<stdio.h>
                                                                                
void main()                                                                     
{                                                                               
  int days = 30;                                                                
  long val = 34353535;                                                          
  char alphabet = 'a';                                                          
  float unitprice = 43.5;                                                       
  double amount = 345353.3432;                                                  
  char name[20] = "codingpointer.com";                                          
                                                                                
  printf("\ndays: %d", days);                                                   
  printf("\nval: %ld", val);                                                    
  printf("\nalphabet: %c", alphabet);                                           
  printf("\nunitprice: %f", unitprice);                                         
  printf("\namount: %lf", amount);                                              
  printf("\nname: %s", name);                                                   
}

Output:

$ cc datatype.c
$ ./a.out 

days: 30
val: 34353535
alphabet: a
unitprice: 43.500000
amount: 345353.343200
name: codingpointer.com

C Program to get the size of different data types

This c program is used to get the size of different data types available in c programming.

#include<stdio.h>                                                            
                                                                                
void main()                                                                     
{                                                                               
  printf("\nInteger size: %d bytes", sizeof(int));                              
  printf("\nLong integer size: %d bytes", sizeof(long));                        
  printf("\nFloat size: %d bytes", sizeof(float));                              
  printf("\nDouble size: %d bytes", sizeof(double));                            
  printf("\nChar size: %d bytes", sizeof(char));                                
  printf("\nString (character array) size: %d bytes", sizeof(char[20]));        
}

Output:

$ cc datatype.c
$ ./a.out 

Integer size: 4 bytes
Long integer size: 8 bytes
Float size: 4 bytes
Double size: 8 bytes
Char size: 1 bytes
String (character array) size: 20 bytes

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