Question

Write python code to input a number and calculate factorial of a number. For example if number is 5 then factorial will be 5x4x3x2x1 = 120.

Answer 1

Codes :

$\tt{\red{ \# \: Python \: is \: Best}} \\ \tt{num\ =\ \purple{int} ( \purple{i nput} (\green{"Enter \: a \: number"} )) } \\ \tt{fact\ =\ 1} \\ \tt{\orange{for} \: i \: \orange{in} \: \purple{range} \: (num) \: :} \\ \; .\; \;\; \; \; \; \tt{fact \: = \: fact \: * \: (i \: + \: 1)} \\ \tt{\purple{print} \: ( \green{" Factorial \: of \: "} \: , \: num \: , \: \green{" \: = \: "} \: , \: fact)}$

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Output :

$\tt{\blue{Enter \: a \: number \: } : \: 5} \\ \tt{\blue{Factorial \: of \: 5 \: = \: 120}}$

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Additional Information :

• Python is a high level, dynamic, Object-Oriented programming language.

• Python was developed by Guido Van Rossum in 1991 , in Netherlands.

Features of Python are :

• Simple and easy.
• Free/Open Source.
• High-level language.
• Portable.
• Extensible and Embedded.
• Standard Library.

Answer 2

Answer:

def fact(n):

   if n==1:

       return 1

   else:

       return n*fact(n-1)

n=int(input("enter a number"))

print(fact(n))