floatp

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          floatp() - determine whether or not a given variable is a
          float

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          int floatp( mixed arg );

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          Return 1 if `arg' is a float number and zero (0) otherwise.

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          mapp(3), stringp(3), pointerp(3), objectp(3), intp(3),
          bufferp(3), functionp(3), nullp(3), undefinedp(3), errorp(3)

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