In this code, we are declaring type of parameters in function definition, also declaring type of output.

Question

https://code.sololearn.com/c29xhJoPUK0Q/?ref=app

Answer 1

i just wanted to add some more information about type annotations.

> just using type annotations in an editor like *sololearn playground* or other *basic editors* does not make sence, since python does not do anything actively with this information, it just *provides* the information.

>> this is totally different with an editor like *visual studio code* (or other professional editors) by using the ide plugins like *pylance* or other linters. these tools /plugins are using the type annotations from the code file actively.

> they show e.g. warnings when there is a type mismatch from a function call and the corresponding paramarer type. so when we type the function name with a pair of parenthesis, the required data types are shown in a popup window.

> code areas that are affected by type problems will be underlined with a red *wavy* line.

> so using type annotations in the discribed way makes a lof of sence for me, because it reduces errors in coding.

Answer 2

An annotation is only an annotation. It is rather part of the documentation. It does NOT do any type validation.

Answer 3

The answer is: Python is not the appropriate language for it.
If you want this feature, use a language like Java which uses static typing.
Anyways
https://code.sololearn.com/c81BOyOW7CIu/?ref=app

Answer 4

But we can assign any type of variable (str, int, float etc.) . Unable to understand whole code. Can anyone explain this?

Answer 5

https://www.sololearn.com/Discuss/3184177/?ref=app

Answer 6

Lamron Thanks for sharing this valuable information

Answer 7

Thanks Lothar for providing info

Answer 8

Thanks very much for quick reply.