Don't understand this output from statement

[Samantha Will]

Hello,

One of my recent programming exams had this question.

#include <stdio.h>

void main()
{
    int i = 0, j=0;
    while(i < 5,j < 10)
    {
       i++;
       j++;
    }
        printf("%d %d", i,j);
}

The options were, 5 5, 10 10, 5 10, 10 5.

I chose 5 10, but surprisingly the answer is 10 10 upon running the code, which is beyond me... Could somebody explain why is that?

Regards!

[John Matthews]

Hi Samantha

If you have an expression (exp1, exp2) then yes, both exp1 and exp2 are evaluated. But the value of exp1 is thrown away; the result of (exp1, exp2) is exp2. Does that help?

Cheers
John

[Samantha Will]

John Matthews wrote:Hi Samantha

If you have an expression (exp1, exp2) then yes, both exp1 and exp2 are evaluated. But the value of exp1 is thrown away; the result of (exp1, exp2) is exp2. Does that help?

Cheers
John

Thanks a lot... I've been thinking hard just to make sense of it...