public class NumberUtilities {

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

        return str;
    }

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

    public static String getRange(int start, int stop, int step) {
        String str= "";

        for (int i= start; i<stop; i+=step ){
            str+=i;
        }
        return str;
    }

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

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

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