Calculate Factorial of a Given Number in Python

def factorial(x):

if x<0:

return “Error: negative number”

y=1

while x>0:

y=y*x

    x=x-1
return y

i=eval(input(“Enter number : “))

print(factorial(i))

#Note : python differentiates between blocks of code through indentation so before running the code do not forget to indent it properly.

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