public class NumberUtilities {

    public static String getRange(int stop) {
        String result = "";
        for (int i=0;i<stop;i++){
            result+=i;

        }

        return result ;
    }

    public static String getRange(int start, int stop) {
        String result = "";
        for (int i=start;i<stop;i++){
            result+=i;
        }
        return result;
    }

    public static String getRange(int start, int stop, int step) {
        String result = "";
        for (int i=start;i<stop;i+=step){
            result+=i ;
        }
        return result;
    }

    public static String getEvenNumbers(int start, int stop) {
        String result = "";
        for (int i=start;i<stop;i+=2){
            int stuff = i;
            if (i%2==0){
                stuff = i;
            }else{
                stuff = i+1;
            }
            result+=stuff;
        }
        return result;
    }

    public static String getOddNumbers(int start, int stop) {
        String result = "";
        for (int i=start;i<stop;i+=2){
            result+=i;
        }
        return result;
    }

    public static String getExponentiations(int start, int stop, int exponent) {
        String result = "";
        for (int i=start;i<=stop;i++){
            int stuff = i;
            for (int j=1;j<exponent;j++){
                stuff *=i ;
            }
            result += stuff;
        }
        return result;
    }
}