need help java multiplication table

**darking123** · October 1st, 2012, 09:13 AM

the output should be
rows 5
column 5
1 2 3 4 5 =120
2 4 6 8 10 =3840
3 6 9 12 15 =29160
4 8 12 16 20 =122880
5 10 15 20 25 =375000
=120 =3840 =29160 =122880 =375000

it means getting the product of each row and each column

import javax.swing.*;
public class activity2
{
public static void main(String []args)
{
int r=Integer.parseInt(JOptionPane.showInputDialog(null,"rows"));
 
int c=Integer.parseInt(JOptionPane.showInputDialog(null,"cols"));
 
int table[][]= new int [r][c];
for(int i=0;i<=table.length-1;i++){
for(int j=0; j<=table[0].length-1;j++){
table [i][j]= (i+1)*(j+1);
if(table[i][j]<0)
System.out.print(table[i][j]+"\t");
else
if(table[i][j] >10 && table [i][j] <100)
System.out.print(table[i][j]+"\t");
else
System.out.print(table[i][j]+"\t");
}
System.out.println("");
}
 
 
}
}

**Norm** · October 1st, 2012, 09:30 AM

Can you post the current output and describe what is wrong with it?

Please edit your code and add proper formatting. Statements should not all start in the first column. There should be indentations of 3-4 spaces for each level of nested logic within each pair of {}s.

**darking123** · October 1st, 2012, 02:23 PM

output is

1 2 3 4 5
2 4 6 8 10
3 6 9 12 15
4 8 12 16 20
5 10 15 20 25

**Norm** · October 1st, 2012, 02:41 PM

The second part of my post asked:
Can you explain what is wrong with the output?

Please edit your code and add proper formatting. Statements should not all start in the first column. There should be indentations of 3-4 spaces for each level of nested logic within each pair of {}s.

**darking123** · October 1st, 2012, 05:03 PM

my code is fine but i do not know how to get the product of each row and each column...like what i posted to my first post..

sorry about the indentions..

**Norm** · October 1st, 2012, 05:18 PM

Start with the numbers on a row. Define a variable to hold the product. As each number for that row is created, include its value in the product for that row. After the last number for the row, print it.

When that code works, work on the logic for the columns. Best to do one at a time.

**darking123** · October 2nd, 2012, 04:48 AM

can you teach me how to do it??

**Norm** · October 2nd, 2012, 06:44 AM

Do the code for the rows first. See post#6 for ideas.

When that works, then work on the columns.

**darking123** · October 2nd, 2012, 08:12 AM

i have really no idea what will i code to hold the values of row 1

**Norm** · October 2nd, 2012, 08:49 AM

Outside the loop, define an int variable with initial value of 0
inside the loop add each number that is generated and printed to the variable
after the loop print the value of the variable at the end of the row.

You need to fix the formatting of your code if you want anyone to look at it.

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