Multplication table

[varund]

hi,i write a code for multiplication table,it is compiled properly but it is showing run time error.i think there is some problm in declaring array.i cant fix it.plz help me out with this..i am a beginner in java.

My code is
class Multiplication
{

public static void main (String[] a)
{
int num = Integer.parseIn t(a[0]);

for( int i=1;i<=10;i++)
System.out.prin tln(i*num);
}

}

Error is :
Exception in thread "main" java.lang.Array IndexOutOfBound sException: 0 at Multiplication. main(Main.java: 6)

[jkmyoung]

How are you running the program?
I suggest putting a debug statement like:
System.out.prin tln("The number is "+a[0]);
as the first line of your main function.

Normally the first argument is the name of the program.

[varund]

Hello jkmyoung,

I tried to insert the command,it goes correct while compiling,and the same error repeating me in the run time.
i am trying to compile the program by javac Multiplication. java and then java Multiplication.

i cant get it,can u edit the code and tell the procedure,what is the mistake i am doing..

[jkmyoung]

Ok. Your program is receiving an empty argument list.
You have to pass in the argument like:
java Multiplication 100

I would suggest checking if there is an argument to begin with, eg:

  if (a.length < 1){
    System.err.println("Usage: java Multiplication [number]");
    return;
  }
}