Working of long Keyword in C Language

January 27, 2023

Long Keyword in C

On this page we will discuss about long keyword in C language. Long keyword is used to declare the long data type in C which is used store large integer values.So this page we will discuss their storage size, range and some examples related to long data type.

Working of Long Keyword in C

In C Programming, long data type is used to store larger integer values that are too large to be stored in a int data type.

The long data types with their storage size, range and format specifier are given in the table below:

Data Type	Storage size	Range	Format Specifier
long	4 bytes	-2,147,483,648 to +2,147,483,647	%ld
long long	8 bytes	-9,223,372,036,854,775,808 to +9,223,372,036,854,775,807	%lld
long double	10 bytes	3.4E-4932 to 1.1E+4932	%lf

The range of values that can be stored in a long variable depends on the implementation of the C compiler and the specific system it is being run on.

Initialization of Long Data type variable

long a = 1234567890;
long long b = 123456789012345678;
long double r = 5.67e+2;

Note: We can use sizeof( ) operator to check the size of any operand or any data vale.

Tokens in C

Size of Operators

Conditional statement Program in C

fseek() in C

pointer v/s array in C

Example 1:

Run

#include <stdio.h>
int main ()
{
  int l;
  long m;
  long long n;
  double o;
  long double p;

  printf (" The size of int = %ld bytes \n", sizeof (l));
  printf (" The size of long = %ld bytes\n", sizeof (m));
  printf (" The size of long long = %ld bytes\n", sizeof (n));
  printf (" The size of double = %ld bytes\n", sizeof (o));
  printf (" The size of long double = %ld bytes\n\n", sizeof (p));

  return 0;
}

Output:

 The size of int = 4 bytes 
 The size of long = 8 bytes
 The size of long long = 8 bytes
 The size of double = 8 bytes
 The size of long double = 16 bytes

Note: The long long data type and long double data type is not supported by all C compilers, so you may need to check the documentation for your specific compiler to see if it supports this data type.

Example 2:

Run

#include <stdio.h>
int main ()
{
  long double p = 123.456789012345678;

  printf ("The value of p is: %Lf\n", p);

  long double res = p + 123.456789012345678;
  printf ("The result is: %Lf\n", res);

  return 0;
}

Output:

The value of p is: 123.456789
The result is: 246.913578

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Working of long Keyword in C Language

Long Keyword in C

Working of Long Keyword in C

Initialization of Long Data type variable

Example 1:

Output:

Example 2:

Output:

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