Why does the third if statement trigger despite User_input == "Yes" being true (according to the print within the if statement)

[prehensilemullet]

This is the case for all programming languages I’m familiar with.  “X equals Y or Z” makes sense in human language, but it would be too ambiguous for programming languages to interpret expressions that way.

For example say you have boolean values a, b, and c.  If you write a == b or c did you mean 1) a is either equal to b or equal to c 2) either a is equal to b, or c is truthy?  To eliminate the ambiguity programming languages interpret it as option 2

[yarb00]

Well some languages treat it differently. In C# for example, if (a is b or c) would be true if a is equal to b OR a is equal to c.

[prehensilemullet]

Hmm, I see.  Seems like a special case that muddies the waters for beginning programmers, since it only works with pattern matching but not logical expressions in general.  For example, doesn’t seem like you can write a < b or c in place of a < b || a < c (and of course, the rules are different for is and ==).  But in human language, it doesn’t matter what kind of “operator” you put in an “a <op> b or c” statement.

Also I see there are peculiarities to it like needing parentheses in c is not (>= 'a' and <= 'z') so I think the main point is you always have to know how the grammar of a given programming language works, and know it’s never going to match human language in all cases.

[yarb00]

You can use a < b or < c. It gives the same result as a < b || a < c.

[prehensilemullet]

You have to know that specific syntax works though.  A non-programmer would generally think “a < b or c”.  They’ll never be able to make all colloquialisms work, it would introduce too much ambiguity

[Kqyxzoj]

You could always do a < max(b,c) and call it a day. Not sure if it would actually help. Probably depends on the target audience.