What the operator `<--` do in C?

Question

I am very new to programming. I know about numerical and logical operators. But I have never seen this- <-- operator. I searched over internet but got nothing helpful.

Here is the code:

int i=5;
while(0 <-- i){
    printf("%d\n", i);
}

The output is:

What is this operator? What does it do?

Edit: I also wish to know about other confusing composite operators like this.

It is challenging to search for, but see this answer, it's helpful: http://stackoverflow.com/questions/1642028/what-is-the-name-of-the-operator — Brian Cain, Mar 06 '16 at 17:37

score 2 · Accepted Answer · edited May 23 '17 at 12:24

2

<-- is not an operator, it is < and -- written without space. Just to make it clear, I rewrite the code like this-

while(0 < --i)

First the value of i is decreased, and then compared if it is greater than 0.

What the operator `<--` do in C?

1 Answers1