Smalltalk抛出nextLine错误

Question

For Smalltalk do we need to import some library to use nextLine?

Transcript show: 'Whatz your name?'. 
userName := stdin nextLine.

When I try to evaluate it throws an error.

Answer 1

Method #nextLine is implemented in Stream. Stdin should be a stream. But "stdin" (with lowercase) is probably a typo.