Because python has truthy and falsy values, falsy values would be 0, '', [], {} this article can help you understand it better https://www.freecodecamp.org/news/truthy-and-falsy-values-in-python/

because if <expression> clauses just need to evaluate <expression>. The computed value is then either true or truthy or not.

You can also just write if True:... or if False:... . You don't have to compare your expression to True or False, that is what if already does.

Why is not: if bool == true: ? to return yes or not