Attempts to evaluate an expression and prevents a failure during this evaluation from stopping all subsequent evaluation.
expris an expression
errexpris an expression
Normally, if an error is raised during evaluation of an expression, all evaluation is immediately terminated and the error message is returned. The
try function allows you to override this behaviour.
expr and if
expr returns an error,
try converts this error to
null which is returned to the caller which can then continue its evaluation. If
expr doesn’t raise an error, the value returned by
expr is returned by
try(expr, errexpr) evaluates
expr and, if no error is raised, returns the value returned by
expr. If an error occurs during evaluation of
errexpr is evaluated and its value is returned (which might be an error if the evaluation of
errexpr raised one).
x ≔ 0; try(x ≔ 10 / RandomInt(−5, 6)); x