Check

Returns its first argument unless a message is emitted, in which case

موضوع‌ها

• Conditionals - Program Execution Conditionals
• Messages - Messages in Notebooks
• New In70 Core Language - New in Message Handling
• Package Development - Messages »
• Robustness And Error Handling - Low-Level Error Handling
• Scoping Constructs - Other Forms of Scoping

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