write a program to find factorial of a number

[0anubhav0]

[shubhamSM1298]

can u assign me pls

[ayush572]

I have made a pull request regarding this program, by creating this program in a different way. Could you plz review it and merge it?
Thank you @0anubhav0 ! :D

[ayush572]

Number of pull request is #16

[yd3112]

@0anubhav0 I have created a Pull Request Please Accept That.