Hey friends !please explain me this code and say why out put is 23?

Question

include <iostream>
using namespace std;

int main() {
int a[3]={1,2,3};
for(int i=1;i<=2;i++)
cout<<a[i];
return 0;
}
//output is 23 ?

Answer 1

a[0] = 1
a[1] = 2
a[2] = 3

Using for loop you are printing second and third element of array that is a[1] , a[2].

Hope this helps ☺️☺️.

Answer 2

This loop will be executed twice only in the first time will print 2 and the second time 3
Clarification:
cout<<a[1]//output:2
cout<<a[2]//output:3
The matrix will begin printing from the second element with the index 1

Answer 3

cin>> [i];

Answer 4

Array index begin from 0, so you start the loop from the second element.