Please somebody explain me the output.

Question

#include <iostream>
using namespace std;

int main() {
int a[10];
cout<<sizeof(a[1]);
cout<<sizeof(a[10]);
return 0;
}
why it shows the size of a[10] as 4
shouldn't it give error as it is out of bound beacause the index is only from 0 to 9?

Answer 1

@vishnu
yes but it is giving me the output. Do give it a try on code playground.

Answer 2

@Mara
i am only asking why it is showing the size of a[10] as 4,
it should be an error.

Answer 3

@vishnu
do you mean like this
char a[10]
cout<<sizeof(a[10])
in this way or any other?

Answer 4

a[10]
doesn't exists...
only upto 9
a[0] to a[9]