anonymous
  • anonymous
What algorithm calculates the sum of digits in a number. Say you want to sum the digits in 4^10, what algorithm could you use?
Computer Science
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
You could use something like this : Lets say you have a number in num and want to add its digits and store in sum . for .e.g. num=12345,sum=0; 1. while num is greater than 0 do following else goto step 5 2. calculate sum as : sum=sum+num mod 10; 3. modify num num=num div 10; 4. goto step 1 5. print sum as result
anonymous
  • anonymous
I think the asker was interested in finding the answer when there is only an expression for the original number like 4^10 rather than 23897
farmdawgnation
  • farmdawgnation
rivermaker, perhaps - however it would be easy enough to write some code to take in the string "4^10" and then turn that into a real number, wouldn't it? Then the above algorithm would apply, yes? Also worth noting that the above algorithm will only work for whole numbers. If you have decimal points involved, I believe things get hairy.

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anonymous
  • anonymous
i agree with farmdawgnation . i thought asker meant to find sum of digits of any number in general. sorry for misunderstanding that . but offcourse one anconvert that into a real number. And secondly, yes this algo will not work correctly for floating numbers.

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