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I was looking at this ML code and I saw this statement

fun doSomething (a, b) = 
    if a < b then ?? else ?? ;

What does the "??" in this context mean?

PTN
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1 Answers1

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Logically thinking, then statement would equal else statement. Could it be simply forgotten to complete statements and temporary place ??'s? None of the operators seem to represent what you are looking for.

Janis S.
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  • Oh wait nevermind you are right. I was reading the code in the "Exercises" section of this book. I'm dumb. – PTN Jul 24 '16 at 22:58