Google and my failing memory are both giving me hints that it does, but every attempt is coming up dry.

```
class Y {
    var y = 0
}
var m = new Y()
m.y_(3)

error: value y_ is not a member of Y

```

Please tell me I am doing something wrong. (Also: please tell me *what it is* I am doing wrong.)

**EDIT**

The thing I am not doing wrong, or at least not the only thing I am doing wrong, is the way I am invoking the setter. The following things also fail, all with the same error message:

```
m.y_ // should be a function valued expression
m.y_ = (3) // suggested by Google and by Mchl
f(m.y_) // where f takes Int => Unit as an argument
f(m.y)  // complains that I am passing in Int not a function

```

I am doing this all through SimplyScala, because I'm too lazy and impatient to set up Scala on my tiny home machine. Hope it isn't that...

**And the winner is ...**

Fabian, who pointed out that I can't have a space between the \_ and the =. I thought out why this should be and then it occurred to me:

> 
> The name of the setter for `y` is **not** `y_`, it is `y_=` !
> 
> 
> 

Observe:

```
class Y {
     var y = 0
}
var m = new Y()
m.y_=(3)
m.y
res1: Int = 3
m.y_=
error: missing arguments for method y_= in class Y;
follow this method with `_` if you want to treat 
it as a partially applied function
       m.y_=
         ^
m.y_=_
res2: (Int) => Unit = 
def four(f : Int => Unit) = f(4) 
four(m.y_=)

m.y
res3: Int = 4

```

Another successful day on StackExchange.