Difference between Empty and Null

try this

http://stackoverflow.com/questions/265875/default-string-initialization-null-or-empty

Thanks&Regards
LakshmiNarayana Nalluri.

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Hi ,
The difference between null and empty value string is that, the empty string is allocated a memory location with value "" and on the other hand the null value is just a pointer pointing nowhere in the memory (nonexistent value or nothing u say about the null value).

Thanks & Regards;
aaa

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Empty - It has empty value.
NULL - It has no value.

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Which is the most efficient then , means in which scenario we need to use empty and null ?

Regards,
Rahul

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Hi Rahuljgosavi,

Try this link...
http://docs.intersystems.com/cache20081/csp/docbook/DocBook.UI.Page.cls?KEY=RSQL_null

Thanks & Regards;
aaa

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string.Empty doesn't create an object while "" creates a string object. So using string.Empty is better than using "" because every time you use "", it creates a new string while string.Empty just reference a string in memory that is created by default. On the other hand null is a the absense of characters, NULL is NOT a value. It is a state indicating that the object value is unknown or nonexistent. It is not zero or blank or an "empty string" and it does not behave like any of these values.

Regards,
Susan

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NULL : http://en.wikipedia.org/wiki/Null_(SQL)
Empty : http://en.wikipedia.org/wiki/Empty_string
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Null is an absence of a value. An empty string is a value, but is just empty. Null is special to a database. The difference between '1' and "1" for in a database query is that the SQL syntax supports '1' for SQL queries, but doesn't use "1".

Thanks
Karthik
www.f5Debug.net

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http://www.daniweb.com/web-development/databases/mysql/threads/145832/what-is-the-main-differences-between-null-value-and-blank
http://www.techonthenet.com/oracle/questions/empty_null.php
http://www.velocityreviews.com/forums/t89906-the-difference-between-string-empty-and-null.html
http://www.coderanch.com/t/464778/java/java/Difference-between-NULL-empty-string

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Empty - It has empty value.
NULL - It has no value.

String s = "";
s.lentgh; // return 0

String s = null;
s.lentgh;//returns a null pointer exception

ER sandeep chourasia
sandeepchrs@yahoo.com (on facebook)
http://www.aspnetcodes.com/

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NULL isn't allocated any memory, the string with NUll value is just a pointer which is pointing to nowhere in memory. however, Empty IS allocated to a memory location, although the value stored in the memory is

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Mark as Answer if its helpful to you,that motivates...

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Refer this link

http://sandeepmhatre.blogspot.com/2013/03/difference-between-stringempty-string.html

Sandeep M,
Software Developer
Follow me on :
http://sandeepmhatre.blogspot.in

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