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powerN  challenge

Posted on 2016-09-09
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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
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Question by:gudii9
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3 Comments
 
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Accepted Solution

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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.
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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);
  }
}

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

Expert Comment

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