sizeof()

In C, the sizeof() operator returns an integer representing the memory size of a data type or variable in bytes.

Syntax

sizeof(input)

• input: The data type or variable whose memory size is to be calculated.

Example

The following example demonstrates the usage of the sizeof() operator:

#include <stdio.h>

int main() {
  // Calculate the memory size of the 'int' data type
  int res = sizeof(int);

  // Print the result
  printf("Size of int: %d bytes\n", res);

  return 0;
}

The above code produces the following output:

Size of int: 4 bytes