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

-------------Problems Reply------------

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;

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

num3 = one;

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);
}
}

Category:java Views:0 Time:2011-10-28
Tags: java variables

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