Assertions: Difference between revisions

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require(a == 42, fn { `Off by ${a - 42}.` }) # computed only on failure</lang>
require(a == 42, fn { `Off by ${a - 42}.` }) # computed only on failure</lang>

=={{header|ECL}}==

<lang>
ASSERT(a = 42,'A is not 42!',FAIL);</lang>


=={{header|Eiffel}}==
=={{header|Eiffel}}==