[MIT-Scheme-users] The behavior of set!

[Peng Yu]

According to the following webpage,

http://www.shido.info/lisp/scheme_asg_e.html

(define var 1)
(set! var (* var 10))
var => 10

However, I get the following output from mit-scheme, when I try the
code. Would you please let me know what ';Value: 1' means? Is '1' the
old value of 'var'?

1 ]=> (define var 1)
;Value: var

1 ]=> (set! var (* var 10))
;Value: 1

1 ]=> (+ var 1)
;Value: 11