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What is Is_defined(), Is_null(), Is_Blank()?

Question Posted / madhugreddy


What is Is_defined(), Is_null(), Is_Blank()?..

Answer / aditya

is_defined : Tests whether an expression results in a non-
NULL value.

Syn :long is_defined(expr)


is_null :Tests whether an expression results in a NULL
value.

Syntax : long is_null(expr)



is_blank : Tests whether a string contains only blank
characters.

Syntax : long is_blank(string str)

Is This Answer Correct ?    29 Yes 2 No

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