//Array Use - Non - OOP version

public class ArrayToolkit{
    
    //Returns sum of array of type integer
     public static int sum(int [] data){
        int sum = 0;
         if(data == null || data.length == 0){
            return sum;
        }
        for(int i = 0; i < data.length; i++){
            sum = sum + data[i];
        }
        return sum;
     }
    
    
    //Returns average value of array of type double
    public static double average(double [] data){
        double sum = 0.0;
        if(data == null || data.length == 0){
            return sum;
        }
        for(int i = 0; i < data.length; i++){
            sum = sum + data[i];
        }
        return sum/(data.length);
    }
    

    //Creates array of integers of the size = n and
    //assign value k to each element and returns the array
   
    public static int [] fiveInts(int n, int k){
        
        //complete
        if(n <= 0){
           return null;   
        }
        
        int [] data = new int[n];
        for(int i = 0; i < data.length; i++){
            data[i] = k;
        }
        
        return data;
    }
}//end of class