public class NumberUtilities {

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

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


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

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


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


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

}
}