EMPTY()

Checks if the passed argument is empty.

Syntax

EMPTY( <xExp> ) --> lIsEmpty

Arguments

<xExp> is any valid expression.

Returns

A logical value. It is true (.T.) if the passed argument is empty otherwise it is false (.F.).

Description

This function checks if an expression has empty value and returns a logical indicating whether it the expression is empty or not.
Examples
      ? EMPTY( "I'm not empty" )    // .F.
Tests
      FUNCTION Test()
         ? EMPTY( NIL )             // .T.
         ? EMPTY( 0 )               // .T.
         ? EMPTY( .F. )             // .T.
         ? EMPTY( "" )              // .T.
         ? EMPTY( 1 )               // .F.
         ? EMPTY( .T. )             // .F.
         ? EMPTY( "smile" )         // .F.
         ? EMPTY( Date() )          // .F.
      RETURN NIL
Status

Ready

Compliance

EMPTY() is fully CA-Clipper compliant.

Files

Library is rtl

See Also