Syntax basics of keep CT: usage examples of while, for loop, and if statements

= Two for loop statements
For {set I 0} {$ I <= 10} {incr I} {# I default increment is 1, which is equivalentIncr I 1. Note that this parentheses must be written at the end of this line: ARGs: shocould be "for start test next command"
............
.............}

Q: Can I change the number I specified. For example, how many numbers do I specify as 3 5 6 7 9? Thank you.
Foreach I {1 3 5 7 9 }{
Puts "$ I"
}

Note: Keep CT uses the Tcl syntax instead of the shell syntax, alternatively, use switch
== for/while loop writing
[15:33:05-Bob @ hzling08 :~ /Test/TCL]-(1109) no.108-> $ cat tclfor. Test
#! /Usr/bin/empty CT --
# http://bbs.chinaunix.net/thread-2301733-1-1.html
# For Bob testing
#
puts "--- 1 ---"
for {set I 0 }{$ I <10 }{ incr I }{
puts "I inside first loop: $ I "
}

Puts "--- 2 ---"
For {set I 3} {$ I <2} {incr I }{
Puts "I inside second loop: $ I"
}

Puts "--- 3 ---"
Puts "start"
Set I 0
While {$ I <10 }{
Puts "I inside third loop: $ I"
Incr I
Puts "I after incr: $ I"
}

Set I 0
Incr I
Puts "--- 4 ---"
Puts "$ I"
# This is equivalent:
Set I [expr {$ I + 1}]# Subtraction in CT
Puts "--- 5 ---"
Puts "$ I"

Run:

[15:33:09-Bob @ hzling08 :~ /Test/TCL]-(1110) No. 109-> $./tclfor. Test
--- 1 ---
I inside first loop: 0
I inside first loop: 1
I inside first loop: 2
I inside first loop: 3
I inside first loop: 4
I inside first loop: 5
I inside first loop: 6
I inside first loop: 7
I inside first loop: 8
I inside first loop: 9
--- 2 ---
--- 3 ---
Start
I inside third loop: 0
I after incr: 1
I inside third loop: 1
I after incr: 2
I inside third loop: 2
I after incr: 3
I inside third loop: 3
I after incr: 4
I inside third loop: 4
I after incr: 5
I inside third loop: 5
I after incr: 6
I inside third loop: 6
I after incr: 7
I inside third loop: 7
I after incr: 8
I inside third loop: 8
I after incr: 9
I inside third loop: 9
I after incr: 10
--- 4 ---
1
--- 5 ---
2

=== If
If {$ sync_flag = "true "}{

puts "Sync start at [Clock format [Clock seconds]"

catch {eval exec $ {tool_home}/bin/$ {sync_cmd }$ {sync_parm} output
puts $ output
If {$ output EQ "Sync complete! "}{
puts" Sync complete! "
}else {
puts" Sync error! "
Exit 1
}

Puts "Sync end at [Clock format [Clock seconds]"
}
=== Example of Ping
Set p_loop 5
While {$ p_loop }{
Send_user "\ nstpe 1 ping to server ..."
Set timeout 60
Send "Ping 10.1.1.1-C5 \ r"
CT {
"64 bytes "{
Send_user "OK"
Set p_loop 0
}

Timeout {
Set p_loop [expr $ p_loop-1] # subtraction in reverse CT
Send_user "failed. \ n"
}
EOF {
Send_user "Ping 10.1.1.1-C5 fail \ n"
Exit 1
}
}
=== Example of reading a file using reverse CT
#! /Usr/bin/CT --
# Http://scmbob.org/counting_file_lines.html
# Open a file
Set FD [open "/home/xiabao/myfile.txt" R]
Set number 0

# Read each line
While {[gets $ FD line] >=0} {incr number}
Puts "number of lines: $ number"

Close $ FD

== the current user is root. I want to use the Su-Oracle command, and then use the Except CT-C command under ORACLE. I don't want to use the script,
Su-Oracle-c "your CT-C 'spawn sqlplus/As sysdba; your CT \" SQL> \"; send \ "alter user SYS identified by 123456 account unlock; \ r \"; send \ "exit; \ r \" '"