A good place to start would be the
LabVIEW page at ni.com. There's product information, a guided tour, demos, interactive tutorials, etc.etc.
What is your application? What is your programming background?
The NI developer zone has a collection of comparative information. For example there is a
side-by-side comparison of LabVIEW and C code. Another
note shows a quick comparison of execution speeds for various tasks.
I'm sure that once you studied the above links you'll have more detailed questions. Just ask here!
Pe
rsonally, I love LabVIEW and haven't had much need to use any other programming tools for the last 8 years.