Help me to understand a sorted array program

[iv5L3TCk]

Please help me to understand this code. Correct me if I am wrong, does
SIZE - 1 mean the last element in the array?

#include <iostream>
using namespace std;

int main()
{
	const int SIZE = 4;
	int arr[SIZE] = { 1,2,3,4 };
	int i = 0;

	while (i < (SIZE - 1) && arr[i] < arr[i + 1])
		i++;
	
	if (i == (SIZE - 1))
		cout << "Sorted" << endl;
	else
		cout << "Not sorted" << endl;
}

[jlb]

Well what it is really doing is preventing you from accessing the array out of bounds on line 10 when you add 1 to i.

But yes it is also the last element in the array.