Tcl/Tk in a Nutshell

Name

scan

scan string format varName...

Parse fields from the string string according to the ANSI C scanf( ) -style format format and place results in the specified variables. Return the number of conversions, or −1 if unable to match any fields. Format placeholders have the form %[*] [width]char, where * discards the field, width is an integer, and possible values of char are as follows:

d	Decimal	o	Octal
x	Hex	c	Char to int
e	Float	f	Float
g	Float	s	String (no whitespace)
[chars]	Chars in given range	[^chars]	Chars not in given range