Printing and Loop Practice

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You are the programmer in charge of the multiplication table team. You will be given two numbers, a and b. Can you print all the multiples of a from a through a*b? Please them on one line, separated by spaces.

Challenge

Print the numbers from a through a*b.

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Comments

David
Jan 9, 3:28 PM

I am getting runtime error everytime System.out.println(); is being executed.
Learneroo
Jan 9, 7:27 PM

@David, your code looks like it runs ok. How would you print the next different multiple of a each time, when you have an index i that increases each time?
David
Jan 9, 7:35 PM

Hi, thanks for the answer. The runtime error was showing up before I clicked reset, seems it cached some error? Anyway great work this website.
Tom Stevens
Jan 13, 8:52 AM

Can you tell me what I've done wrong in the code below:

For (int index=a, index=<b, int index = index + 1){
a*i=answer;}
System.out.println(answer);
Learneroo
Jan 13, 11:28 AM

To fix the syntax errors, replace =< with <= and remove the second int since you've already declared index as an int in the beginning. You can click on the buttons on the side for help with syntax.

Dino Šišić

Feb 19, 4:00 PM

if someone is looking for some other solution here is mine and it includes 1 if:

public static void doStuff(int a, int b){
    for (int i=a;i<=a*b;i=i+1){
        if (i%a==0){
        System.out.print(i + " ");
        }
    }
}

Michał Targiel

May 28, 1:06 PM

CORRECT:

public class Main {

public static void doStuff(int a, int b){
for(int i=1; i<=b ; i=i+1){
System.out.print(" "+ a*i);

Jul 6, 9:09 PM

I am constantly getting the following runtime errors:

Main.java:13: error: class, interface, or enum expected
public static void main(String[] args) {
cont...
^

Main.java:16: error: class, interface, or enum expected
int n = in.nextInt();
^
Main.java:17: error: class, interface, or enum expected
for(int i=0; i<n; i++){
^
Main.java:17: error: class, interface, or enum expected
for(int i=0; i<n; i++){
^
Main.java:17: error: class, interface, or enum expected
for(int i=0; i<n; i++){
^
Main.java:19: error: class, interface, or enum expected
int b= in.nextInt();
^
Main.java:20: error: class, interface, or enum expected
doStuff(a, b);
^
Main.java:21: error: class, interface, or enum expected
System.out.println("");
^
Main.java:22: error: class, interface, or enum expected
}
^
9 errors
Learneroo
Jul 6, 9:28 PM

@Joshua, careful with {}. Reset the code and put back code in the method body.
catypus
Sep 28, 11:14 AM

What development app should I use to try this on my own? NetBeans? I've heard of that one...
Learneroo
Sep 28, 11:22 AM

In the next module, we suggest beginners use BlueJ to get started. Afterwards, you can use any of the main IDEs (Netbeans, Eclipse or IntelliJ)
Jaci Covington
Nov 10, 9:42 AM

Why do we have to put the print statement for the space on a separate line? I had no luck with (m, ' ')