hello

Creates a single button; if you click on it, a message is typed and the application terminates.

Runnable under wish · 22 lines

#!/bin/sh
# the next line restarts using wish \
exec wish9.0 "$0" ${1+"$@"}

# hello --
# Simple Tk script to create a button that prints "Hello, world".
# Click on the button to terminate the program.

package require tk

# The first line below creates the button, and the second line
# asks the packer to shrink-wrap the application's main window
# around the button.

button .hello -text "Hello, world" -command {
    puts stdout "Hello, world"; destroy .
}
pack .hello

# Local Variables:
# mode: tcl
# End: