Question: It makes sense to have an if-expression in a programming language. a) Does it make sense to have a while-expression; that is, can a while-expression

It makes sense to have an if-expression in a programming language.

a) Does it make sense to have a while-expression; that is, can a while-expression return a value, and if so, what value?

b) Does it make sense to have a case or switch expression; that is, can a case-expression return a value, and if so, what value?

c) Does it make sense to have a do-or repeat expression; that is, can a do-expression return a value, and if so, what value?

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