Difference between for n while

[rohitjogya@gmail.com]

Can anyone tell me the difference bet for loop and while loop
execution?
_______________ _____
for (i=0 ; i<10 ; i++)
; /* Do nothing*/

print i;

_______________ ____
i=0;
while (i<10) {
i++;
}
print i;
_______________ _____

wat will be the output?
please expain ur ans

[Anthony Irwin]

Re: Difference between for n while

rohitjogya@gmai l.com wrote:

Can anyone tell me the difference bet for loop and while loop
execution?
_______________ _____
for (i=0 ; i<10 ; i++)
; /* Do nothing*/
>
print i;
>
_______________ ____
i=0;
while (i<10) {
i++;
}
print i;
_______________ _____
>
wat will be the output?
please expain ur ans
>

Hi,

You code won't work in c.

Try the following instead.

#include <stdio.h>

int main(void) {
int i=0, ii = 0;
while (i<10) {
i++;
}
printf("%d\n", i);

for (ii=0 ; ii <10 ; ii++)
; /* Do nothing*/

printf("%d\n", ii);
return 0;
}

The answer to the above is 10 for both loops.

The reason is that it reaches 9 and then increments in the loop and
when it comes back around it is 10 and then the loop stops because it
is not less then 10.

Kind Regards,
Anthony Irwin

[Anthony Irwin]

Re: Difference between for n while

Anthony Irwin wrote:

rohitjogya@gmai l.com wrote:

>Can anyone tell me the difference bet for loop and while loop
>execution?
>______________ ______
>for (i=0 ; i<10 ; i++)
> ; /* Do nothing*/
>>
>print i;
>>
>______________ _____
>i=0;
>while (i<10) {
> i++;
>}
>print i;
>______________ ______
>>
>wat will be the output?
>please expain ur ans
>>

Actually this program will probably show you more.

#include <stdio.h>

main() {
int i=0, ii = 0;
while (i<10) {
printf("Inside Loop: %d\n", i);
i++;
}

printf("Outside Loop: %d\n", i);

for (ii=0 ; ii <10 ; ii++)
printf("Inside Loop: %d\n", ii);

printf("Outside Loop: %d\n", ii);
return 0;
}

Output below:

Inside Loop: 0
Inside Loop: 1
Inside Loop: 2
Inside Loop: 3
Inside Loop: 4
Inside Loop: 5
Inside Loop: 6
Inside Loop: 7
Inside Loop: 8
Inside Loop: 9
Outside Loop: 10
Inside Loop: 0
Inside Loop: 1
Inside Loop: 2
Inside Loop: 3
Inside Loop: 4
Inside Loop: 5
Inside Loop: 6
Inside Loop: 7
Inside Loop: 8
Inside Loop: 9
Outside Loop: 10

See how the loop never reaches 10 on the inside only outside the loop.
The loop never executes when it is 10.

the ii++ increments after the loop has complete in the for loop.

Just play with some code and compile it any you will learn a fair bit.

Kind Regards,
Anthony Irwin

[rohitjogya@gmail.com]

Re: Difference between for n while

Thank you so much

[rohitjogya@gmail.com]

Re: Difference between for n while

If there is no any diff bet for and while loop, den why some people
say that
use while loop while handling pointers like in LinkedList programs?

[Richard Heathfield]

Re: Difference between for n while

rohitjogya@gmai l.com said:

If there is no any diff bet for and while loop, den why some people
say that
use while loop while handling pointers like in LinkedList programs?

I y c b b t w E p a f a y c, w s w b b t r w y w ?

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999

http://www.cpax.org.uk

email: rjh at the above domain, - www.

[J. J. Farrell]

Re: Difference between for n while

On Apr 1, 11:46 pm, "rohitjo...@gma il.com" <rohitjo...@gma il.com>
wrote:

If there is no any diff bet for and while loop, den why some people
say that
use while loop while handling pointers like in LinkedList programs?

Please try to write in English. You'll need to ask the people who say
that.

[CBFalconer]

Re: Difference between for n while

"rohitjogya@gma il.com" wrote:

>

.... snip ...

>
wat will be the output?
please expain ur ans

Ankor Wat is overgrown and abandoned in the jungles of Cambodia. I
believe the actual location of Ur is not accurately known, and that
it is also buried in the sands of Mesopotamia. The pain comes from
not taking the exlax. It is not connected with Ur.

Your shift key is apparently broken.

--
Chuck F (cbfalconer at maineline dot net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home .att.net>



--
Posted via a free Usenet account from http://www.teranews.com

[Army1987]

Re: Difference between for n while

<rohitjogya@gma il.comha scritto nel messaggio
news:1175491046 .417003.21000@d 57g2000hsg.goog legroups.com...

Can anyone tell me the difference bet for loop and while loop
execution?
_______________ _____
for (i=0 ; i<10 ; i++)
; /* Do nothing*/
>
print i;
>
_______________ ____
i=0;
while (i<10) {
i++;
}
print i;

In C89, the only relevant differences between

expression_0;
while (condition) {
expression_1;
expression_2;
expression_3;
expression_n;
}

and:

for (expression_0; condition; expression_n) {
expression_1;
expression_2;
expression_3;
}

are:

1. In the first case, condition cannot be empty, in the second case it can
and if it is it is considered to be 1 (always true).
2. If a continue statement is used in the for loop, expression_n is evalued
before checking condition and resuming the loop from expression_1 if it is
true.

In C99 expression_0 can be a variable declaration, and the variable so
declared is only visible within the loop body. There are also other
differences, but unless you want to do pointless things such as re-defining
an enum in the loop body, they won't show up.

(Personally, I consider while (condition) a shorthand for for (;condition;)
rather than vice versa...)

[rohitjogya@gmail.com]

Re: Difference between for n while

Exactly....
I was look for this information only...
For and while loop will produce diff o/ps in case of continue
statement !!

[Gunvant Patil]

Re: Difference between for n while

On Apr 2, 11:46 am, "rohitjo...@gma il.com" <rohitjo...@gma il.com>
wrote:

If there is no any diff bet for and while loop, den why some people
say that
use while loop while handling pointers like in LinkedList programs?

I would say For is better choice than While if you are dealing with
LinkedList.

for (temp = head; temp->nxt != NULL; temp = temp->nxt) {
/* Do something */
}

temp = head;
while (temp->nxt) {
/* Do something */
temp = temp->nxt;
}

decide your self which is more readable and less prone to errors.

-Cheers,
Gunvant
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