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View source for Calculate the factorial of a number

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← Calculate the factorial of a number

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====Example 1====
<pre>
 # let rec fact = function
     | 0 -> 1
     | n -> n * fact(n-1);;
 val fact : int -> int = <fun>
</pre>
For example:
<pre>
 # fact 5;;
 - : int = 120
</pre>

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