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#include <iostream>
using namespace std;
int fibonacciLoop(int nthNumber) {
//use loop
int previouspreviousNumber, previousNumber = 0, currentNumber = 1;
for (int i = 1; i < nthNumber ; i++) {
previouspreviousNumber = previousNumber;
previousNumber = currentNumber;
currentNumber = previouspreviousNumber + previousNumber;
}
return currentNumber;
}
int main()
{
cout<< fibonacciLoop(1) << endl; // SHOULD BE 0
cout<< fibonacciLoop(2) << endl; // SHOULD BE 1
cout<< fibonacciLoop(3) << endl; // SHOULD BE 1
cout<< fibonacciLoop(4) << endl; // SHOULD BE 2
return 0;
}
