Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

powerN  challenge

Posted on 2016-09-09
3
70 Views
Last Modified: 2016-09-11
Hi,

I am working on below challenge
http://codingbat.com/prob/p158888


Given base and n that are both 1 or more, compute recursively (no loops) the value of base to the n power, so powerN(3, 2) is 9 (3 squared).

powerN(3, 1) → 3
powerN(3, 2) → 9
powerN(3, 3) → 27
i was not clear on how to find the powerN using recursion? please advise
0
Comment
Question by:gudii9
  • 2
3 Comments
 
LVL 27

Accepted Solution

by:
rrz earned 500 total points
ID: 41792204
This challenge is very similar to the other challenges that you started to the same time. I can give you two hints about the base case here.  Every number to the power of 0 is equal to one.  Furthermore, every number multiplied by 1 is equal to that same number.
0
 
LVL 7

Author Comment

by:gudii9
ID: 41793661
public int powerN(int base, int n) {
   if(n==0) return 1;
//  if(n==1) return base;
  else{
   return base*powerN(base,n-1);
  }
}

Open in new window

above passes all test. any alternate approaches or improvements?
0
 
LVL 27

Expert Comment

by:rrz
ID: 41793740
My solution is the same as yours.
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Entering a date in Microsoft Access can be tricky. A typo can cause month and day to be shuffled, entering the day only causes an error, as does entering, say, day 31 in June. This article shows how an inputmask supported by code can help the user a…
Today, the web development industry is booming, and many people consider it to be their vocation. The question you may be asking yourself is – how do I become a web developer?
This video teaches viewers about errors in exception handling.
In this fifth video of the Xpdf series, we discuss and demonstrate the PDFdetach utility, which is able to list and, more importantly, extract attachments that are embedded in PDF files. It does this via a command line interface, making it suitable …

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question