Comma Operator :

Comma operator is a set of expression separated by comma is a valid constant in the C language. For example i and j are declared by the statements

int i , j;
i=(j=10,j+20);

In the above declaration, right hand side consists of two expressions separated by comma. The first expression is j=10 and second is j+20. These expressions are evaluated from left to right. ie first the value 10 is assigned to j and then expression j+20 is evaluated so the final value of i will be 30.

C – COMMA OPERATOR EXAMPLE PROGRAM:

#include<stdio.h>
#include<conio.h>
void  main()
{
int i, j;
clrscr();
i=(j=10, j+20);
printf(“i = %d\n j = %d\n” , i,j  );
getch();
}

#include<stdio.h>

#include<conio.h>

void main()

{

int i, j;

clrscr();

i=(j=10, j+20);

printf(“i = %d\n j = %d\n” , i,j );

getch();

}

Output :

i = 30

j = 10

Comma Operator :

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