What is the meaning of n!= 1

Answer 1

It could also be a comparison operator. != means 'not equal to'
https://data-flair.training/blogs/python-comparison-operators/

Answer 2

The python != ( not equal operator ) return True, if the values of the two Python operands given on each side of the operator are not equal, otherwise false .

http://net-informations.com/python/iq/not.htm

Answer 3

It's called factorial!! It's a part of mathematics!! There are rules of factorial..if you learn that then you can understand the answer why n!=1.
Tutorial for learning factorial!!😊
Wikipedia:
https://en.m.wikipedia.org/wiki/Factorial

Math is fun:
https://www.mathsisfun.com/numbers/factorial.html