Input from keyboard in Tcl

How do I give input to a Tcl s开发者_高级运维cript through the keyboard? Is there any thing like scanf() in C?

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The gets command is probably what you want.

set data [gets stdin]
# or
set numchars [gets stdin data]

The scan command can be used to parse the input similar to how scanf does with C. It uses the format: scan string format ?varName varName ...?

Thus, to parse an input like "5 cats" to individual variables:

set data [gets stdin]
scan $data "%d %s" myint mystring

Edit: Added more information from Colin's comment.

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puts -nonewline "Enter your name: "
flush stdout
set name [gets stdin]

puts "Hello $name"