String interpolation of variable value - scala

Question

I want the variable value to be processed by string interpolation.
val temp = "1 to 10 by 2"
println(s"$temp")
output expected:
inexact Range 1 to 10 by 2
but getting
1 to 10 by 2
is there any way to get this way done?
EDIT
The normal case for using StringContext is:
$> s"${1 to 10 by 2}"
inexact Range 1 to 10 by 2
This return the Range from 1 to 10 with the step value of 2.
And String context won't work on variable, so can there be a way I can do like
$> val temp = "1 to 10 by 2"
$> s"${$temp}" //hypothetical
such that the interpreter will evaluate this as
s"${$temp}" => s"${1 to 10 by 2}" => Range from 1 to 10 by step of 2 = {1,3,5,7,9}

Answer 1

By setting a string value to temp you are doing just that - creating a flat String. If you want this to be actual code, then you need to drop the quotes:
val temp = 1 to 10 by 2
Then you can print the results:
println(s"$temp")
This will print the following output string:
inexact Range 1 to 10 by 2
This is the toString(...) output of a variable representing a Range. If you want to print the actual results of the 1 to 10 by 2 computation, you need to do something like this:
val resultsAsString = temp.mkString(",")
println(resultsAsString)
> 1,3,5,7,9
or even this (watch out: here the curly brackets { } are used not for string interpolation but simply as normal string characters):
println(s"{$resultsAsString}")
> {1,3,5,7,9}
Edit
If what you want is to actually interpret/compile Scala code on the fly (not recommended though - for security reasons, among others), then you may be interested in this:
https://ammonite.io/ - Ammonite, Scala scripting
In any case, to interpret your code from a String, you may try using this:
https://docs.scala-lang.org/overviews/repl/embedding.html
See these lines:
val scripter = new ScriptEngineManager().getEngineByName("scala")
scripter.eval("""println("hello, world")""")