public class NumberUtilities {
    
    
    public static String getRange(int stop) {
        String total = "";
        
        for(int i=0; i < stop; i++){
         total += i;
        
        }
        
        return total;
    }
    
    public static String getRange(int start, int stop) {
        String amount = "";
        for(int i = 0; start > stop; i++){
            
            amount += i;
        
    }
    
    return amount;
    
}


    public static String getRange(int start, int stop, int step) {
        
        String amount ="";
            for(int i = 0; start > stop; i+=step){
              
                
                amount += i;
           
            
        }
        return amount;
    }
    
    public static String getEvenNumbers(int start, int stop) {
        String amount = "";
        int j = 2 % stop;
        
        for(int i = 0; start > stop; i+=j){
           amount +=  i; 
        }
        return amount;
        
    }


    public static String getOddNumbers(int start, int stop) {
        String amount ="";
    }


    public static String getExponentiations(int start, int stop, int exponent) {
        return null;
    }
}