CODEWITHSUNDEEP
javavariables
user1018865
user1018865

Reputation: 21

How do I initialize the variable?

I'm writing a program for my class where I have to use a for loop to takes two numbers from the keyboard. The program should then raise the first number to the power of the second number. Use a for loop to do the calculation. I'm getting the error that inum3 is not being initialized (I understand because the loop may never enter) but I cannot figure out how to make this work. Line 25 and 28 to be specific.

import javax.swing.*;


  public class Loop2
{
  public static void main(String[] args)
  {


    int inum1, inum2, inum3, count;
    String str;

    str = JOptionPane.showInputDialog("Please Enter a Numer");
    inum1 = Integer.parseInt(str);

    str = JOptionPane.showInputDialog("Please Enter a Numer");
    inum2 = Integer.parseInt(str);


    for (count = 1; count == inum2; count+=1)
    {
     inum3 = inum3 * inum1;
    }

     JOptionPane.showMessageDialog(null, String.format ("%s to the power of %s = %s", inum1,inum2, inum3), "The Odd numbers up to" + inum1,JOptionPane.INFORMATION_MESSAGE);
}//main
  }// public

Upvotes: 2

Views: 375

Answers (3)

lancegerday
lancegerday

Reputation: 762

initialize num3 to one because you cand use something to define itself.

num3 = one;

Upvotes: 2

Dave
Dave

Reputation: 4597

import javax.swing.JOptionPane;

public class Loop2 {
    public static void main(String[] args) {

        int base, exp, result = 1;
        String str;

        str = JOptionPane.showInputDialog("Please Enter a Number");
        base = Integer.parseInt(str);

        str = JOptionPane.showInputDialog("Please Enter an Exponent");
        exp = Integer.parseInt(str);

        for (int count = 0; count < exp; count++) {
            result *= base;
        }

        JOptionPane.showMessageDialog(null, String.format("%s to the power of %s = %s", base, exp, result),
                "The Odd numbers up to" + base, JOptionPane.INFORMATION_MESSAGE);
    }
}

Upvotes: 1

hvgotcodes
hvgotcodes

Reputation: 120168

you need to initialize the variable inum3. As it stands right now, when your program tries to execute

inum3 = inum3 * inum1;

inum3 has no value, so it can't do the multiplication.

I think you want it to be 1 in this case.

So instead of

int inum1, inum2, inum3, count;

you can do

int inum1, inum2, inum3 = 1, count;

Upvotes: 3

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