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if then else in Ada #4

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philippekruchten opened this issue Sep 13, 2021 · 1 comment

philippekruchten commented Sep 13, 2021

Not an issue, just a comment...

The programming language Ada tried to refine the if-then-else:

with an end if
with an elsif (as a single word)
https://www.adaic.org/resources/add_content/standards/05rm/html/RM-4-4.html#S0115
and this combined with Boolean expressions having and then and or else.
https://www.adaic.org/resources/add_content/standards/05rm/html/RM-4-4.html#S0115

provided quite sophisticated, and unambiguous forms of this statement.
:-)

Thanks for the slides, Erica.

Philippe

ericfischer commented Sep 14, 2021

Thanks! That is a nice syntax for distinguishing short-circuit booleans from those where the whole expression is always evaluated.

I have used elsif many times thanks to its appearance in Perl, and elif in shell scripts.

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