Function Factorial (n)
The above Function obtains the factorial of a given number n in a recursive manner. If the number is positive and other than zero then factorial is computed otherwise for zero the Function returns 1.
Step 1 If number is zero
if (n = 0) then
return 1.
Step 2 If number is greater than zero.
if (n > 0) then
return (n * Factorial (n – 1))
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