size_t is an unsigned integer data type which can assign only 0 and greater than 0 integer values. It measure bytes of any object's size and returned by sizeof operator.
const is the syntax representation of size_t, but without const you can run the programm.
const size_t number;
size_t regularly used for array indexing and loop counting. If the compiler is 32-bit it would work on unsigned int. If the compiler is 64-bit it would work on unsigned long long int also. There for maximum size of size_t depending on compiler type.
size_t already define on <stdio.h> header file, but It can also define by
<stddef.h>, <stdlib.h>, <string.h>, <time.h>, <wchar.h> headers.
const)#include <stdio.h>
int main()
{
const size_t value = 200;
size_t i;
int arr[value];
for (i = 0 ; i < value ; ++i)
{
arr[i] = i;
}
size_t size = sizeof(arr);
printf("size = %zu\n", size);
}
Output -: size = 800
const)#include <stdio.h>
int main()
{
size_t value = 200;
size_t i;
int arr[value];
for (i = 0 ; i < value ; ++i)
{
arr[i] = i;
}
size_t size = sizeof(arr);
printf("size = %zu\n", size);
}
Output -: size = 800