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 read the algorithm, then study the program code line by line. After that, compare the code with the output and finally go through the explanation. This approach helps learners understand both the logic and the implementation properly.
After understanding this example, try to rewrite the same program without looking at the code. Then change some values or logic and run it again. This helps improve confidence and keeps learners engaged on the page for longer.