public static int lastDigit(int a) {
        a = a % 10;
        if (a <= 0){
        a *= -1;
        }
        return a;
    }

This is my solution. The course hasn't taught if else yet, so I'm wondering if there is a way to do it without the if else.

    public static int lastDigit(int a) {
    a = a % 10;
    return a;
    }

The problem with this is that it will not print the last digit of a negative number as a negative.