Help - Only run if application is open?

Question

I am new to scripting so I don't have much knowledge yet, but is there a way to have a script only run if an application is open. Let me explain exactly what I am doing. Basically I have a program that runs a script which tells me what song is playing in iTunes. I have the script set up fine, but the way the program works is that it checks every 10 seconds to retrieve the song info. This means that I really can't quit iTunes, because if I do, it reopens in <10 seconds because the script runs. So is there a way to add a line or two in the script to tell it to only retrieve the song info if iTunes is already open? Thanks!

Answer 1

This script will only say "hello" if iTunes is open. Note that if you're saving this as a stay-open application, you'll want to replace error number -128 with tell me to quit
click here to open this script in your editor<pre style="font-family: 'Monaco', 'Courier New', Courier, monospace; overflow:auto; color: #222; background: #DDD; padding: 0.2em; font-size: 10px; width:400px">tell application "System Events" to if "iTunes" is not in name of processes then error number -128 -- tell me to quit
say "hello"
</pre>