[Solved] Comparing 2 numbers in a loop not working correctly

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To give you an example of a better code:

int number1 = scanner.nextInt();
int number2 = 0;
while (true) {
        number2 = scanner.nextInt();       

        if (number1 == number2){
            System.out.println("Woo!");
            break;
        }
       number1 = number2;

}

Explanation:
This code will always compare the two last entered numbers. (e.g. 1,2,2 will print Woo!).
For better legibility I changed your for loop into a while loop.
number1 == number2 returns always the same as number2 == number1. That’s why number1 == number2 || number2 == number1 isn’t needed.

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solved Comparing 2 numbers in a loop not working correctly