What is this <-- ? (Anyone explain this for me)

Question

i didn't read about this operator before.
First time, i saw it in a challenge.
.

int a=0;
int b=13;
while ( b <-- 1)
{
a++;
}
cout <<a;

output is 12

Answer 1

@bhRT

example/
int a = 12;
int b = 12;
int c = 0;

if(b > --a)
c++;

cout << c;

output: 1.

I did this with an if statement, I'm assuming you know how it would work in a while loop. (same stuff just looping till false).

--a with decrement a then use it.
so:
if(b > --a)
is the same as:
if (12 > 11)

* the value of a is now 11.
* value of b is still 12.

If your still confused on --a, take a look at these explanations of what they are:
++x
x++
--x
x--
https://www.sololearn.com/Discuss/305422/?ref=app

Answer 2

<-- is actually just < --1
It's 2 operators, without the space it looks like one.
< is less than.
--x decrements x before using it.

So while(b<0)
// do code

ps: I think you wrote the question incorrecly, I'm not sure how a can be 12.

Unless I'm missing something that c++ has.

Answer 3

oups lol. I'll edit it to >.

Answer 4

big bro i didn't remember exactly.
can you please give me example .

Answer 5

bro in your example
if (b <--a) // is false
then why output is 1

Answer 6

😂😂😂😂

Answer 7

12

Answer 8

bHRT it is (b >--a)