for(int i=1; i<=5; i++) cout << arr[i] << " ";

for(int i=0; i < sizeof(arr)/sizeof(arr[0]); i++) cout << arr[i] << " ";

int i=0; while(i < 5) { cout << arr[i] << " "; }

int *p = arr; while(*p) { cout << *p << " "; p++; }