S.O.S. Mathematics CyberBoard

Hi, need help with the following. Can someone please help me. If possible also explanation to the answer:

Q. Write a function ‘factorial’ that takes in one input:

int num

and returns the factorial of the given number.

If the function is passed 0 or a negative number then your
function should return 0.

Thanks and Regards
Nirmala

seems like you don't really understand what you are doing since this is a relatively trivial problem. Also it is not "other topics in advanced mathematics" so I moved it to Computer science...

one example might be

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What about 0! ?



I assume whatever code is being used knows empty products are 1 (empty when top limit < bottom limit), or you might need to fiddle and just define factorial(0) := 1, but anyways.

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odd as it is, the problem defined factorial (0) as 0.

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That is odd. Oh well, I rescind my objection, and thank you Ilaggoodly.

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there are three cases of inputs
1. If you will pass negative number then it will return zero,as no factorial for -ve no.
2. If you will zero,then it will return 1 as factorial zero is 1.
3. If you will pass any number greater then zero, then third return will execute and here recursion will
work. factorial function call recursively.

Ex .if you will pass 4 as a input
Then return factorial(3)*4 will call. Calling steps are

(factorial(3)*4) -------then function factorial will call 3 as a input
((factorial(2)*3)*4)-----then function factorial will call 2 as a input
(((factorial(1)*2)*3)*4)---then function factorial will call 1 as a input
((((factorial(0)*1)*2)*3)*4)----then function factorial will call 0 as a input

when factorial(0) will call thn it execute second return statement in function which will return 1
then calculation will perform like 1*1*2*3*4* =24
24 will be final return value