comma and semi colon

Is there a difference in the functionality between the
comma(,) and the semi colon(;) operators?

The comma operator is an operator that can be used within expressions, the semicolon is simply punctuation for a statement. They perform fundamentally different roles, so an accurate comparison wouldn't make sense.

difference >>>
exemple
#include <math>
int main()
{
pow(10,,9);
}

;==> define end of instruction
,==>separate tow argument 10 and 9

------------------------------------------------------------------------------------------

exuse me for mistake

Code:

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pow(10,9);

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Quote:

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Originally Posted by enjoy

difference >>>
exemple
#include <math>
int main()
{
pow(10,,9);
}

;==> define end of instruction
,==>separate tow argument 10 and 9

------------------------------------------------------------------------------------------

---

You're (rightly) confused. The C language has a comma operator and a comma separator. The separator is what separates arguments of a function. It is not the comma operator though, it's merely punctuation, just like the semicolon.

=====>

Quote:

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originally posted by Neuhart
You're (rightly) confused. The C language has a comma operator and a comma separator

Code:

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i want to explain the exemple but i know that


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The separator is what separates arguments of a function. It is not the comma operator though, it's merely punctuation, just like the semicolon

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Code:

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int a = 10, 20;  // comma as an operator
printf( "%d\n", a );  // comma as a separator

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in the code

Code:

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int a = 10, 20;  // comma as an operator
printf( "%d\n", a );  // comma as a separator

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, and ; are both operators, so where is ;(semi colon) used as a seperator or a puntuation mark.

and is there any difference in the comma or semi colon operator

i was wondering if we could replace the , with the semi colon in this bit of code

Code:

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while( ch = getchar(), ch >=0)

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>, and ; are both operators
No, they're both tokens. A comma has use as an operator or a punctuator depending on the context, but a semicolon is not an operator, ever.

>so where is ;(semi colon) used as a seperator or a puntuation mark.
Everywhere you see a semicolon, it's used as punctuation.

>and is there any difference in the comma or semi colon operator
Yes there is. One is an operator, one is not. I feel like I'm repeating myself.

>i was wondering if we could replace the , with the semi colon in this bit of code
No.

ok
i kind of understand it now

what about in this code

Code:

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while( ch = getchar(), ch >=0)

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the comma is a seperator?

can you provide an example where the comma is an operator?

if the ; is a seperator
does thie mean we can actually ignore the last ;

so we could have code like


....
funtion_a;
function_b

the semi colon is more then a separator. Its kind of like the period of a sentence. Without it one does not know where a sentence ends.

Pascal used the semi colon as a command separator but C uses it as a command terminator.

Quote:

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Originally Posted by studentc

ok
i kind of understand it now

what about in this code

Code:

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while( ch = getchar(), ch >=0)

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the comma is a seperator?

can you provide an example where the comma is an operator?

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In that code, the comma is an operator. The comma would be a separator, for example, in a function call:

Code:

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  printf("%s", buf);

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Edit:

They key difference is that a comma (used either as an operator or as a separator) separates expressions while a semi-colon separates statements.

Quote:

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Originally Posted by studentc

if the ; is a seperator
does thie mean we can actually ignore the last ;

so we could have code like
....
funtion_a;
function_b

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No, you can't ignore the last one, but you could replace the first one with a comma:

Code:

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function_a( ),
function_b( );

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Quzah.