public class NumberUtilities {
    
    public static String getRange(int start) {
        String answer = "";
        
        for(int i = 0; i < start; i ++)
        {
            String string = String.valueOf(i);
            answer += (string);
        }
        return answer;
    }
    
    public static String getRange(int start, int stop) {
        String answer = "";
        for(int i = start; i < stop; i++)
        {
            String string = String.valueOf(i);
            answer += string;
        }
        return answer;
    }


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


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


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