Thread: What's wrong with my code?

Hello, I'm working on my Computer Science project but I can't figure out what's wrong with my code!


for (int x = 1; x <= Expo; x++)
{
for (int i = 1; i <= Expo; i++)
{
Output.setText(Base + " to the exponent " + i + " = " + pow(Base,i) + "\n");
}
}

The output I'm trying to get looks something like this (assuming the base is 2 and the exponent is 10):

2 to the power of 1 = 2
2 to the power of 2 = 4
2 to the power of 3 = 8
2 to the power of 4 = 16
2 to the power of 5 = 32
2 to the power of 6 = 64
2 to the power of 7 = 128
2 to the power of 8 = 256
2 to the power of 9 = 512
2 to the power of 10 = 1024

But the output that I'm getting (still assuming the base is 2 and the exponent is 10):

2 to the power of 10 = 1024

Please help! Thanks, Rara

Yah the code will only print out one line, and setText(); is just to output the code into the designated output area, I'm using netbeans. I've tried System.out.println(); but the same thing happens, just one line. And Base along with Expo are just the names of the inputs. I have to go to bed right now but I look forward to a response, thanks.

~Ryan

Hi,

You just need to use one loop that goes until the expo = 10 is reached.
so you need to modify your code as
say if your input variable base = 2 and Expo = 10

for (int x = 1; x <= Expo; x++)
{

System.out.println(base + " to the exponent " + x + " = " + Math.pow(base,x) + "\n");
}

hope this will solve your problem

I tried it with your code it worked but it went into the console rather than the application. When I used System.setText(); only one line shows up and I'm not sure why. When I use your code it will show all of the exponents which I wanted. So I'm not sure how to fix the error that's occurring in Netbeans. Thanks for helping me though, it means a lot!

--- Update ---

Sorry for missing the questions Norm. I'm new to Java so I'm not sure what class the Output variable is, but the setText(); method is to take the code from above and put it into a specific location in the application.

private void CalculateActionPerformed(java.awt.event.ActionEven t evt) {
String text1, text2;
int Base, Expo;
text1 = Ba.getText();
text2 = Ex.getText();
Base = Integer.parseInt(text1);
Expo = Integer.parseInt(text2);

for (int x = 1; x <= Expo; x++)
{

Output.setText(Base + " to the exponent " + x + " = " + Math.pow(Base,x) + "\n");
}



}

I think the class that it's in is CalculateActionPreformed.

If Output is as swing component like JLabel then you can use this setText method to set its text to the output you got earlier.
You just need to use for eg if you are directing your output to be shown on a Jlabel

JLabel Output= new JLabel();
int Base=2;
for (int x = 1; x <= 10; x++)
{
string = string + Integer.toString(Base) + "to the exponent " + Integer.toString(x) + " = " + Double.toString(Math.pow(Base,x)) ;

Output.setText( string );

}

The result will be displayed on the label. Hope this solves your problem now

I contacted my teacher and the solution to my problem was this:

Output.setText(Output.getText() + Base + " to the exponent " + x + " = " + Math.pow(Base,x) + "\n");

I appreciate all of the time you put in to help me, it's good to know people are willing to help others that they don't know. Thanks a lot!