public class NumberUtilities {

    public static String getRange(int stop) {
        String fin = "";
        for(int i = 0; i < stop; i++){
            fin = fin.concat(String.valueOf(i));    
        }
        return fin;
    }
    
    public static String getRange(int start, int stop) {
        String fin = "";
        for(int i = start; i < stop; i++){
            fin = fin.concat(String.valueOf(i));
        }
        return fin;
    }


    public static String getRange(int start, int stop, int step) {
        String fin = "";
        for(int i = start; i < stop; i += step){
            fin = fin.concat(String.valueOf(i));
        }
        return fin;
    }
    
    public static String getEvenNumbers(int start, int stop) {
        String fin = "";
        for(int i = start; i < stop; i++){
            if(i%2 == 0){
                fin = fin.concat(String.valueOf(i));
            }
        }
        return fin;
    }


    public static String getOddNumbers(int start, int stop) {
        String fin = "";
        for(int i = start; i < stop; i++){
            if(i%2 != 0){
                fin = fin.concat(String.valueOf(i));
            }
        }
        return fin;

    }


    public static String getExponentiations(int start, int stop, int exponent) {
        String fin = "";
        for(int i = start; i <= stop; i++){
            fin = fin.concat(String.valueOf(Math.round(Math.pow(i, exponent))));
        }
        return fin;
    }
}