Basic Examples (2) 

Check if an expression has a missing value at default level 1:

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Check if an expression contains a missing value (at default level 1):

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At level 2, the expression contains a missing value:

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Scope (4) 

Define some sample data with missing values:

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Check if it contains missing values at the lowest level (-1):

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Use with Select to get the element of the list with the missing value:

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Select the data that does not contain missing values:

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Possible Issues (1) 

ContainsMissing does not yield True if only the symbol Missing is present; it yields True only if there is a Missing expression:

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