Use of sizeof

#include "simpletools.h" // Include simpletools

int main() // main function
{
  int p[] = {1, 2, 3, 5, 7, 11, 13, 17, 19, 23}; // Initialize the array
  for(int i = 0; i < sizeof(p)/sizeof(int); i++)
   {
    pause(500); // 1/2 second pause
    p[i] = p[i] * 100;
    printf("p[%d] = %d\n", i, p[i]); // Display array element & value
   }
}