C Language Example - Calculate the Byte Sizes of int, float, double and char
C Language ExamplesUse the sizeof operator to calculate the byte sizes of the four variable types: int, float, double, and char.
sizeof is a unary operator in C language, like other operators in C such as ++, --, etc. It is not a function.
The sizeof operator gives the storage size of its operand in bytes.
Example
#include <stdio.h>
int main()
{
int integerType;
float floatType;
double doubleType;
char charType;
// The sizeof operator is used to calculate the byte size of a variable
printf("Size of int: %ld bytes\n",sizeof(integerType));
printf("Size of float: %ld bytes\n",sizeof(floatType));
printf("Size of double: %ld bytes\n",sizeof(doubleType));
printf("Size of char: %ld byte\n",sizeof(charType));
return 0;
}
Run result:
Size of int: 4 bytes Size of float: 4 bytes Size of double: 8 bytes Size of char: 1 byte
Calculate the byte sizes of long long and long double.
Example
#include <stdio.h>
int main()
{
int a;
long b;
long long c;
double e;
long double f;
printf("Size of int = %ld bytes \n", sizeof(a));
printf("Size of long = %ld bytes\n", sizeof(b));
printf("Size of long long = %ld bytes\n", sizeof(c));
printf("Size of double = %ld bytes\n", sizeof(e));
printf("Size of long double = %ld bytes\n", sizeof(f));
return 0;
}
Run result:
Size of int = 4 bytes Size of long = 8 bytes Size of long long = 8 bytes Size of double = 8 bytes Size of long double = 16 bytesother extensions