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how to write a factorial in C++

Computer Science
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factorial !! explain more plz !!!
3 factorial = 3! = (3*2*1)
so say i want \[\frac{ x^3 }{ 3! }\]

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Other answers:

is there an operator for that
or would i just type it out as (3*2*1)
I got it , I'll explain the algorithm : we can write a loop like this : for i is from x to 1 then : x! = x * (x-1)
how would i write this
most efficiently
for example .. to calc 5! : for i= 1 to 5 do x!=x(x-1) is it clear ?
is that all you would type
what does i mean
I'm sorry I'll not write the code to you , I've told you the idea and U've to try ... good luck
ok thanks
@iop360 Try writing the steps out by hand, then look at the process you used and replicate it in your code.

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