CR-MicroLabs-Loops-NumbersTrianglesTables/NumberUtilities.java

 


public class NumberUtilities {
    
    public static String getRange(int stop) {
        StringBuilder anw = new StringBuilder();
        for (int i=0; i<stop; i++){
           
            anw.append(i);
    }
       
        
      
        return anw.toString();
    }
    
    public static String getRange(int start, int stop) {
        StringBuilder anw = new StringBuilder();
        for (int i=start; i<stop;i++){
            anw.append(i);
        }
       
        return anw.toString();
    }


    public static String getRange(int start, int stop, int step) {
        StringBuilder anw = new StringBuilder();
        for (int i=start; i<stop; i=i+step){
            anw.append(i);
        }
        return anw.toString();
    }
    
    public static String getEvenNumbers(int start, int stop) {
    StringBuilder anw = new StringBuilder();
    if (!isEven(start)){
        start += 1;
    }
          
       for (int i=start;i<stop;i=i+2){
         
           anw.append(i);
        }
        
    
   
    
    return anw.toString();
}
    
    

    public static String getOddNumbers(int start, int stop) {
        StringBuilder anw = new StringBuilder();
        if (isEven(start)){
        start = start+1;
        }
        for (int i=start;i<stop;i=i+2){
           
            anw.append(i);
        }
        return anw.toString();
    }
   
    public static boolean isEven(int num){
        return num % 2 == 0;
    }

    public static String getSquareNumbers(int start, int stop){
        StringBuilder anw = new StringBuilder();
        for (int i=start;i<=stop;i++){
            anw.append ((int) (Math.pow(i,2)));
            
        }
        
        return anw.toString();
    }
    
    public static String getExponentiations(int start, int stop, int exponent) {
        StringBuilder anw = new StringBuilder();
        for (int i=start; i<=stop; i++){
            anw.append((int)(Math.pow(i,exponent)));
        
        
    }
        return anw.toString();
}

}