How to ask the user how many elements to print from an array?

[rania.idan]

Hello,
I have a really simple question, I'm feeling a little slow right now. The objective is to initialize the first n positions of a given array of 100 elements with n random integers using the Random class, n should be given by the user.

Basically, I just need help figuring out what to assign to this print statement: System.out.print("How many elements would you like to print? Must be between 0 and 100.");. I tried n[0] = keyboard.nextInt(); but that didnt work.

This is my code:

import java.util.Scanner;
import java.util.Random;

public class PA6 {
	public static void main(String[] args) {

		int n[] = new int[100];

		Scanner keyboard = new Scanner(System.in);

		Random randomNumbers = new Random();

		System.out.print("How many elements would you like to print? Must be between 0 and 100.");
		//////// what to put here?? //////////////////

		for (int i = 0; i < n.length; i++) {
			n[i] = (int) (randomNumbers.nextInt(1000) + 1);
		}
		for (int b = 0; b < n.length; b++)

			System.out.print(n[b] + " ");
		System.out.println();

	}
}

[f1gh]

///what to post here
basically you need to declare a int variable
int num;
num = keyboard.nextInt();

but i have questions about your logic:

int n[] = new int[100];

		Scanner keyboard = new Scanner(System.in);

		Random randomNumbers = new Random();

		System.out.print("How many elements would you like to print? Must be between 0 and 100.");
		//////// what to put here?? //////////////////
                // shouldn't the second expression in for statment be i<num;i++;?
		for (int i = 0; i < n.length; i++) {
			n[i] = (int) (randomNumbers.nextInt(1000) + 1);
		}
		for (int b = 0; b < n.length; b++)

			System.out.print(n[b] + " ");
		System.out.println();

shouldn't the second expression in both for loops be i <num;?
this is my sample output when i set both for loops middle expression with i<num, instead of array length

How many elements would you like to print? Must be between 0 and 100: 20
481 309 430 173 262 502 462 602 929 972 299 890 902 405 738 18 783 197 526 547

[rania.idan]

That's what I was having trouble with, but you just answered all my questions. You made it sound so simple. Thank you so much! =)