- 1 year ago
how to put EXEC command in loop in TCL with windows platform
To execute a command in a loop in Tcl on a Windows platform, you can use the exec
command along with a loop construct like for
or while
. The exec
command allows you to execute external programs and capture their output. Here's an example of how you can use the exec
command in a loop on Windows:
tcl# Example using the for loop
for {set i 1} {$i <= 5} {incr i} {
set result [exec echo "Hello, loop $i"]
puts $result
}
In this example:
- The
for
loop iterates from 1 to 5. - Inside the loop, the
exec
command runs theecho
command with the argument"Hello, loop $i"
. - The output of the
exec
command is captured in theresult
variable. - The
puts
command is used to print the contents of theresult
variable.
Alternatively, you can use a while
loop:
tcl# Example using the while loop
set i 1
while {$i <= 5} {
set result [exec echo "Hello, loop $i"]
puts $result
incr i
}
In both examples, the exec
command is used to execute the echo
command with the specified argument, capturing the output into the result
variable. The loop iterates five times, changing the value of $i
in each iteration.
Replace "Hello, loop $i"
with the actual command you want to execute in the loop.
Keep in mind that Tcl uses forward slashes (/
) as path separators even on Windows, so when specifying paths to external programs in the exec
command, you should use forward slashes. For example: [exec C:/path/to/program.exe arg1 arg2]
.