Question

This assignment asks to create an array with 10 integer elements. Ask user to input 10 integer values. going through all the array elements and find/print out all the prime numbers. Instructions: Only use for loops for this lab (no need to create methods or classes for this assignment). Put a comment on each line of your codes, explaining what each line of code does.

basic java, please

Answer 1

//TestCode.java
import java.util.Scanner;
public class TestCode  {
    public static void main(String[] args) {
        // Creating scanner object
        Scanner scan = new Scanner(System.in);
        boolean isPrime;
        int x;

        // Declaring an array with 10 ints
        int arr[] = new int[10];

        // Reading values from user
        System.out.println("Enter 10 integer values for array:");
        for(int i = 0;i<arr.length;i++){
            arr[i] = scan.nextInt();
        }

        // Looping through each value in array
        for(int i = 0;i<arr.length;i++){
            x = arr[i];

            // Assuming x is prime
            isPrime = true;

            // Loop through 2 to x-1
            for(int j = 2;j<x;j++){
                // if x is divisible by any of j
                if(x%j == 0) {
                    // Then setting isPrime to false
                    isPrime = false;
                }
            }

            // Printing value of x if it is a prime
            if(isPrime){
                System.out.println(x);
            }
        }
    }
}