S.I/Lisp/

ISATOM

=ISATOM(A1:E1)
-> FALSE

=ISATOM(A1)
-> FALSE

=ISATOM(1)
-> TRUE

=ISATOM(#N/A!)
-> TRUE
        

DEFINE(
    ISATOM,
    LAMBDA(
        input,
        MEMBER(
            TYPESTRING(input),
            VLIST(
                "Number",
                "String",
                "Error"))))
        

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