Small Java Code for Math

[Nancy]

I intend to teach my grade 4 Mathematics students on factors. And I would
like to write a Java code (the only language available in my school) and
demo it on a terminal. But I know nothing about Java. Please Help!

The expected code should read an integer from the keyboard and then output
all the factors of the number, including 1 and itself. For instance:

reading 15, output 1,3,5,15
reading 60, output 1,2,3,4,5,6,10,12,15,20,30,60
etc.

In the past, I used my DBase III+ code to do it and it worked well. But
now only Java is available and I have to re-code it.

Could anyone suggest the ways that I can follow?

[Nikhil]

Hi Nancy,
Use the following code..
//////////////////////////////////////
import java.io.*;

public class Factor
{
public static void main(String[] args) throws IOException
{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
System.out.print("Please enter an integer " );
String input = in.readLine();
if (!input.equals(""))
{
try
{
int inputval = Integer.parseInt(input);
if ( inputval == 1)
System.out.println("The only factor of 1 is 1");
else
{
StringBuffer sb = new StringBuffer("The factors of " + input + " are ");
int max = ( inputval /2) + 1;
for (int x=1; x < max ; x++)
{
if ( (inputval%x) == 0 )
sb.append(x+",");
}
sb.append(inputval);
System.out.println(sb.toString());
}
}
catch(NumberFormatException e)
{
System.out.println("Please enter an valid integer like 1,2..." );
}

}
}
}



//////////////////////////////////////
Cheers,
Nikhil

"Nancy" wrote:
>
>I intend to teach my grade 4 Mathematics students on factors. And I would
>like to write a Java code (the only language available in my school) and
>demo it on a terminal. But I know nothing about Java. Please Help!
>
>The expected code should read an integer from the keyboard and then output
>all the factors of the number, including 1 and itself. For instance:
>
>reading 15, output 1,3,5,15
>reading 60, output 1,2,3,4,5,6,10,12,15,20,30,60
>etc.
>
>In the past, I used my DBase III+ code to do it and it worked well. But
>now only Java is available and I have to re-code it.
>
>Could anyone suggest the ways that I can follow?

[Nancy]

Hi Nikhi,

Thank you so much for your kind help. I'll compile it to make it work.
Hope this would convince my subject panel and my students.

Sincerely thanks with warmth.


Nancy