public class exercises { public static void main (string[] args) {//int[] data={

Question

public class exercises { public static void main (string[] args) {//int[] data={50,20,45}; //int [] data2={-4,-1,-3,-10,-2}; //system.out,println(" min element in data is:" +find min (data)); //system.out.println("min element data2 is :" +find min(data2)); //todo:use the code examples above to solve for the following //"max element of data is: ?"; //"max element of data2 is : ?"; //"range of the data is : ?"; //range of data2 is: ?";} //to do:find min(int [] input) //todo:find max(int[] input) //todo :find range (int[] input) //must reuse find min() and find max() //todo:sum(int[]input }

Explanation / Answer

/*The java program Exercise3 that calls the methods findMin,findMax,findRange and sum
* on two integer data arrays and print the resutls on console.
* */

import java.util.Arrays;
//Exercise3.java
public class Exercise3
{
   public static void main(String[] args)
   {
      
       //declare and intialize the arrays,data and date2
       int[] data={50,100,20,45};
       int[] data2={-4,-1,-3,-10,-2};

      
       //To display the elements in the array , use toString method of Arrays class
       System.out.println("date : "+Arrays.toString(data));
       System.out.println("date2 : "+Arrays.toString(data2));
      
       System.out.println("Min element in data is:"+findMin(data));
       System.out.println("Min element in data2 is:"+findMin(data2));

       System.out.println("Max element in data is:"+findMax(data));
       System.out.println("Max element in data2 is:"+findMax(data2));

       System.out.println("Range of data is:"+findRange(data));
       System.out.println("Range of data2 is:"+findRange(data2));

       System.out.println("Sum of values in data is:"+sum(data));
       System.out.println("Sum of values in data2 is:"+sum(data2));

   }

   /*The method sum that takes an array of integer values and
   returns the sum of the values in the input data array.*/
   private static int sum(int[] data)
   {
       //initilaize total variable of integer type to zero
       int total=0;

       for (int index = 0; index < data.length; index++)
       {
           //add elements at index of array ,data to total variable
           total=total+data[index];
       }
       //returns total value
       return total;
   }
   /*The method findRange that takes an array of integer values and
   returns the range of the values in the input data array.*/
   private static int findRange(int[] data)
   {
      
       //call findMin and store in min varibale
       int min=findMin(data);
       //call findMax and store in max varibale
       int max=findMax(data);
      
      
       //range=max-min
       //return the range value
       return max-min;
      
   }
   /*The method findMax that takes the input argument data as
   * input array and returns the maximum element as return value
   * */
   private static int findMax(int[] data)
   {
       //assume that the starting element at index =0 is maximum element
       int max=data[0];

       //repeat for loop starting from index=1
       for (int index = 1; index < data.length; index++)
       {
           //check if value at index is less than max element
           if(data[index]>max)
               max=data[index];
       }

       //return maximum value
       return max;

   }

   /*The method findMin that takes the input argument data as
   * input array and returns the minimum element as return value
   * */
   private static int findMin(int[] data)
   {
       //assume that the starting element at index =0 is minimum element
       int min=data[0];

       //repeat for loop starting from index=1
       for (int index = 1; index < data.length; index++)
       {
           //check if value at index is less than min element
           if(data[index]<min)
               min=data[index];
       }

       //return minimum value
       return min;
   }
}

--------------------------------------------------------------------------------------------------------------------------------------------------------

Sample output:

date : [50, 100, 20, 45]
date2 : [-4, -1, -3, -10, -2]
Min element in data is:20
Min element in data2 is:-10
Max element in data is:100
Max element in data2 is:-1
Range of data is:80
Range of data2 is:9
Sum of values in data is:215
Sum of values in data2 is:-20

Note : If you dont need to display elements in the array, remove the lines that contains Arrays.toString

Hope this helps you....

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