> OK! I guess only :age will work in a function :)
>
> age and :age will both work at the core prompt.

I think Graham may mean something slightly different.

age1: 45

age2: func [] [return ask "how old are you"]

All these return the value associated with age1:

age1
== 45
:age1
== 45
get 'age1
== 45

But watch the difference with 'age2

age2
how old are you(escape)   ;; ie executes the function

:age2          ;; appears to do nothing
get 'age2   ;; ditto

So try:

type? :age2
== function!     ;;ah ha! it returns the function, rather than executes it

probe get 'age2     ;; ditto
func [][return ask "how old are you"]


See the difference?
Sunanda.
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