How can an assignment be used as an operand to the != operator?

Question

For example:

while((*s1++=*s2++)! ='\0')

How can the assignment of *s2++ to *s1++ be compared with '\0'?

Possible duplicate of [What is the result of an assignment expression in C?](http://stackoverflow.com/questions/16567622/what-is-the-result-of-an-assignment-expression-in-c) — Stephen C, Oct 03 '16 at 04:04
By searching before you asked, and reading the search results. For example, if you had searched for "[c] assignment expression" you would have found the Q&A that I found. — Stephen C, Oct 03 '16 at 04:45

score 1 · Answer 1 · answered Oct 03 '16 at 03:59

1

The value of an assignment expression is the value that was assigned to the left operand of the expression.

So what you have there is a test that the value assigned to *s1 is not equal to '\0'.

answered Oct 03 '16 at 03:59

Stephen C

Thanks a lot for answering – Rajesh Shaw Oct 03 '16 at 04:04
How would I come to know that this is a duplicate question – Rajesh Shaw Oct 03 '16 at 04:13

1 Answers1