• ← $Failed
• → Failure

Check

WMA link

Check[expr, failexpr]

evaluates expr, and returns the result, unless messages were generated, in which case it evaluates and failexpr will be returned.

Check[expr, failexpr, {s1::t1,s2::t2,...}]

checks only for the specified messages.

Return err when a message is generated:

• • Check[1/0, err]

Check only for specific messages:

• • Check[Sin[0^0], err, Sin::argx]

• • Check[1/0, err, Power::infy]