Thread: In desperate need of help. Making an exponents table.

Please post what you have so far.
Start with a variable with a value of 1 and multiply it by the base and save that value and then loop and do it again until done.

There only needs to be 1 for loop. Once you collected base 'b' and exponent 'e', the for loop would run from x = 1 to x<= e. Inside the for loop just print out b and b^x.

Thanks for the replies, working on it now! Just posted the code I have now, if anyone could elaborate a little more it'd be nice. I think i know what to put in the loop now, but i don't think i understand the concept of a for loop.

I understand you up until you say "Inside the for loop just print out b and b^x. " Do you mean put that in the update part? I understand for(x=1; x<= exponent; ???)

I also dont understand what should be in the System.out.println(???); after the loop.

For testing just print out the value of the index.

When you can get the loop working like you want, then add code to compute the value to be printed.

what should be in the System.out.println(???)

The variable that contains the computed amount.

I'm so frustrated! lol. Well I'm really having trouble with the update part of the loop now. I can't get it right.

Post the code and ask your questions about what you want it to do.
Do things one at a time:
make a loop that goes for exponent times
when that works
compute the value inside of the loop using the base and loop index
print the value

Oh i see. So there is some expression(s) I'm missing before the loop I think. I'm going to experiment some more, if I don't figure it out ill be more specific and takes things one at a time. I really appreciate your help!

@shiftasterisk
Please run your code through a compiler before posting it here. Your for statement is going to confuse the OP.

Originally Posted by shiftasterisk

First lets change your variables to something more descriptive

    Scanner kb = new Scanner(System.in);
    int base = kb.nextInt();
    int exponent = kb.nextInt();

Alright so before leaving the for loop in terms of x was a bad idea because it wasn't informative enough.

Here's the basic for loop

for (int exp = 1; int x <= exponent; x++)

As you can see exp will start at 1, increments on each iteration and ends at the 'exponent' which was inputted by the user. This will be the first column (x) as described in your first post. Now that you have your first column (x), you just need your second column (base^x).

So inside the loop will print 'base' (the first column) and then print 'base^exp' (your second column)


Do you understand it now?

Figured it out. Notice the important piece of code that was left out after the for loop.

import java.util.*;
 
public class Project1 {
 
  public static void main(String[] args) {
 
    Scanner kb = new Scanner(System.in);
    int b = kb.nextInt();
    int y = kb.nextInt();
    int result = 1;
 
    for(int i = 0; i<=y; i++) {
 
System.out.println(i + "\t" +result);
 
 
result *= b; // pre-calculate for next test
             }
 
 
      }
   }

Originally Posted by Norm

@shiftasterisk
Please run your code through a compiler before posting it here. Your for statement is going to confuse the OP.

yea whoops, really botched that one as i was in a rush, sorry about that. Glad the OP figured it out, I edited my post just in case for future references tho.