I don't understand why my java code doesn't work.....:(

[nonny]

When I run it, all it says is "Input a number"...:(
any help appreciated...
Note: I am completely new to coding

EDIT: How do I set iBalance to the args value?
now it keeps displaying There is less than $500 in the account.

This is the what I'm trying to do:
A bank account starts out with an initial balance, iBalance. Interest is computed monthly at 6% per year (0.5% per month). Every month $500.00 is withdrawn to meet education expenses. After how many years is the account depleted?

/* Class Args read a number from argument list and print its square.
   to run the program after compiling type:   java Args 30 in command window.
*/
public class zzz
{
   public static void main (String[] args)
  {
     float aNumber=0;
     // Read input argument
     if (args.length < 1){ 
        System.out.println("Input a number"); 
        System.exit(0); // Terminate the program if user has not input a number
      }
      else
        aNumber = Float.parseFloat(args[0]); 
      
 double balance = iBalance + iBalance*interest; //initial balance with interest

      while (balance >= 500+500*interest) {
          balance = iBalance + iBalance*interest - 500;
          month = month + 1;          
      }
      if (balance <= 500+500*interest) {
          System.out.println("There is less than $500 in the account.");
      }   
      
      if (month >= 12) {
          year = month/12;
          month = month%12;

          System.out.println("The account will be depleted in "+year+"year(s) and"+month+"months");
      }
      else if(month >=12){
          System.out.println("The time it takes the account to be depleted is"+month+"month(s)");
      }
      
      
     // Your codes go here
     System.out.println(aNumber*aNumber); // Sample output to test the program
      
  }
}

[java.java]

When you run this program you have to enter the arguments after the filename.
First compile the java file using "javac filename" and run the program using "java classfilename arguments". Here arguments is the value you are passing. Try this and let me know if it works.

[nonny]

When you run this program you have to enter the arguments after the filename.
First compile the java file using "javac filename" and run the program using "java classfilename arguments". Here arguments is the value you are passing. Try this and let me know if it works.

Thank you! It works. Now to fix my messed up code...

[nonny]

What would I call the value of args in my code?.. I used balance = args, and that failed..

[Reeling]

What do you mean it failed?

[nonny]

What do you mean it failed?

I mean it's incorrect.
error: incompatible types
double iBalance=args;
^
required: double
found: String[]

[DarrylBurke]

Please go through the Forum Rules -- particularly the third paragraph.

db

[nonny]

Please go through the Forum Rules -- particularly the third paragraph.

db

Sorry. Won't happen again. I don't know how to change the title now. I tried and can only change my first posts title

[DarrylBurke]

You can't assign a String[] value to a variable of type double. Learn about variables here: Variables (The Java™ Tutorials > Learning the Java Language > Language Basics)

db

[Tolls]

'args' is an array of Strings (representing the stuff entered at the end of the 'java <yourclass>' line).

So you want to take the argument that represents the balance (say args[0]) and assign that to the balance.
However args[0] is a String, so you need to find a method to parse a String and convert it into a double (which is what balance is).
Have a look at the Double API.

[gowthamgutha]

try this,

args[0]=Float.parseFloat(iBalance).toString();

First of all what is the use of setting the iBalance to the args value?

[Tolls]

Because they want to use the number in their calculations.
Hard to do sums with Strings...

At least this time you didn't link to your blog.

[DarrylBurke]

try this,

args[0]=Float.parseFloat(iBalance).toString();

First of all what is the use of setting the iBalance to the args value?

Since when does Float#parseFloat(...) return a double? And how does assigning a value to args[0] make use of a command line argument?

Please learn Java before attempting to answer questions here. This is just one of many incorrect responses you have posted today.

db

[nonny]

Thanks for the help/links everyone