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 = result+i;
           
        }
        return result;
    }


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

    public static String getOddNumbers(int start, int stop) {
        String oddNumberReturned = "";
        for(int i = start; i < stop; i++) {
          if(i % 2 != 0){
            oddNumberReturned = oddNumberReturned + i;
    }
       }
            return oddNumberReturned;
        }
    
    public static String getExponentiations(int start, int stop,int exponent) {
      String results = "";
      for (int i = start; i <= stop; i++){
            results = results + (int)Math.pow(i,exponent);
    }
    return results;
}
}