Define a class to declare an array of size twenty of double datatype, accept the elements into the array and perform the following :
Calculate and print the product of all the elements.
Print the square of each element of the array.
import java.util.Scanner;
public class RansariSDADouble
{
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
double arr[] = new double[20];
int l = arr.length;
double p = 1.0;
System.out.println("Enter 20 numbers:");
for (int i = 0; i < l; i++)
{
arr[i] = in.nextDouble();
}
for (int i = 0; i < l; i++)
{
p *= arr[i];
}
System.out.println("Product = " + p);
System.out.println("Square of array elements :");
for (int i = 0; i < l; i++)
{
double sq = Math.pow(arr[i], 2);
System.out.println(sq + " ");
}
}
}
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.