[tutorial] If-else statement

[Dancentcee]

Description of the tutorial
. What is an if-else statement
. How to declare an if-else statement
. A few examples and tasks

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Optional: Any additional info you want to add
... Everything is pretty much covered

[sabderemane]

There is already a tutorial for that : https://github.com/inspirezonetech/TeachMeJavaScriptLikeIm5/blob/main/6-conditions/conditions.js

Except if you see some improvements to do, I'm closing the issue.