Re: NULL value anyone?

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  • Posted by irv Mar 28, 2015
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Seems to me there is a need for null values in a program. How else are you going to warn the programmer, "Hey dummy, you forgot to supply a value for ..."?

If you forget to declare a variable x, and then write ? x * 2, you expect to be warned that "x is undeclared". Similarly, if you do declare "atom x" and then code ? x * 2, what is the answer supposed to be? There's no default value of x that could be assigned without causing somebody some trouble sometimes.

What is two times "darned if I know"? How could that produce meaningful results?

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