Random number generator

Hi all,

Does anyone know if there is a way / a code for my customers to receive a random ticket number after every purchase. I am setting up a competition company and would like a random number generated with every purchase.

Competition with 200 entries :

E.g customer purchases 2 tickets so that customer would need two random ticket numbers between 1-200 sent with there thank you for purchase email.

Many thanks,

Harry.

This may be a place to start:

https://www.random.org/

or here

https://www.calculatestuff.com/widgets/miscellaneous/random-number-generator