[Newbies] Undeclared variable issue

[Edward A. Waugh]

The following code doesn't execute in my Squeak workspace

| n |
n <- 5 factorial.
n printString

because it insists that n is undeclared despite that I have declare the it in the first line of the 3 line code fragment.  (I highlight all 3 lines and use the "do it" to execute it.)

What is going here - this is valid Smalltalk syntax?

Thanks,
Edward
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