What is a null statement in C language?

[fun2sh]

hi guys today my first sem computer exams got over.
one question in paper was WHAT IS A NULL STATEMENT? how it is useful? can some1 tel me the ans.
i wrote a statement followed by double semi colon where second semi colon acts like a null statement. m i right?

koi to batao bhai log

[slugger]

you cud check out the meaning of Null Statement from here (http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V40F_HTML/AQTLTBTE/DOCU_072.HTM)

[Zeeshan Quireshi]

simply saying a nul statement is a "blank" statement , it absolutely does not do anything , it is terminated like any normal statement by a semicolon ';' .

e.g.
int x=5; // this stament is not null
; // this one's null
x=9; //another statement

[Manshahia]

wat is its use then??

[abhishek_del]

it is like

int *p=NULL;
here p is a pointer and above statement, initializes a pointer p with null value....this is what is null, nothing else....
It is useful in pointers, to check if they are not inititalized to wrong places or not pointing to places where windows is using the memory..

[casanova]

It says don't do anything. Used mostly in conditions and loops.

[Zeeshan Quireshi]

wat is its use then??
it's used in loops n stuff when you don't want to do anything and the syntax demands that you provide atleast one statement for execution :)

[Rollercoaster]

one possible use in loops

for ( ; ; ) {
....
....
....
}

[fun2sh]

hey its a blank followed by a semicollon. just like wat i said. i checked on net. i got the result. it seems u guys hav to study C a bit more:mrgreen:

[ahref]

hey its a blank followed by a semicollon. just like wat i said. i checked on net. i got the result. it seems u guys hav to study C a bit more:mrgreen:
I think many of the above post also says same thing.

[tanvi chaturvedi]

hy was goin thru it... n ques struck in mind..
Q: wats d ASCII value of NULL..
Q: in characters hw to represent NULL.. ?

[ahref]

ASCII value =0
represented as '\0'
hy was goin thru it... n ques struck in mind..
Q: wats d ASCII value of NULL..
Q: in characters hw to represent NULL.. ?