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type/filedesc - check for an object of type filedesc
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Calling Sequence
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type(e, 'filedesc')
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Description
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The call type(e, 'filedesc') checks whether the expression e may be a valid file descriptor. File descriptors are expressions of types integer, string, or symbol.
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Note that this type check is a surface type check only. It does not verify that the expression e actually refers to an open file.
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Examples
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![type(book[1], 'filedesc')](/support/helpjp/helpview.aspx?si=9286/file04607/math87.png)
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