See http://www.purl.org/tcl/home/man/tcl8.4/TclCmd/scan.htm for the formal man page for the Tcl command scan.
scan $possiblyZeroedDecimal %d cleanInteger set cleanInteger [scan $possiblyZeroedDecimal %d]
The fact that leading zeroes induce octal parsing is an often-reported problem.
display and numeric format for ASCII characters. display and numeric format for ASCII characters. Scan provides the usual answer:
foreach character {a A b B c} {
scan $character %c numeric
puts "ASCII character '$numeric' displays as '$character'."
}
ASCII character '97' displays as 'a'.
ASCII character '65' displays as 'A'.
ASCII character '98' displays as 'b'.
ASCII character '66' displays as 'B'.
ASCII character '99' displays as 'c'. In more recent Tcl's (8.3 or so up) you also can call scan inline:
set numeric [scan $character %c]
And the %c format is not limited to ASCII, but can handle any Unicode. (RS)
Also see "Dump a file in hex and ASCII", as well as "u2x" in the "Bag of algorithms".
Binary has a scan which complements use of this scan.
Tcl syntax help - Arts and crafts of Tcl-Tk programming - Category Command