11-17-2017
Other than testing to see if we would notice that the code you have shown us could not possibly produce the output you have shown us, I'm not sure what you want us to do.
Inconsistent spacing, mismatched quotes, undefined variables all lead me to believe that the code you have shown us could not be run successfully by any shell on a BSD, Linux, or UNIX operating system.
Unless this is an entry in an obfuscated code contest, using a utility named
RUN_FILE and using a variable named
RUN_FILE is not a good coding practice.
If you have a problem and need our help, please:
- tell us what operating system and shell you're using,
- show us the actual code that you are running,
- show us the actual output produced when you run that code,
- and clearly specify what it is that you are trying to do, what is not working, and indicate where you are stuck trying to fix your code.
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while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________
NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________
DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
EXAMPLE
Read lines from a channel until we get to the end of the stream, and print them out with a line-number prepended:
set lineCount 0
while {[gets $chan line] >= 0} {
puts "[incr lineCount]: $line"
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)