If I had an array with various integer values and wanted to find what index value contains a given search value, is there a command to do that, or do I simply have to write a little search function?

For example.  If I had the following array:
and I was looking for 3, I would want a function to return the value 4.
Or, if I was looking for 6, I'd want it to return the value 1.

Is there a built in function that can do this, or do I have to write a simple FOR EACH loop and do it manually.  I know in some languages like PHP they have such functions array_search($needle, $haystack).

There is an easy way to do this: -


There is a lot you can do with arrays. Have a look ]here.

 Perfect!  That's exactly what I was looking for.  Just I'm kinda surprised that it was listed in the help under Integer[]  and not under Array.  No wonder I didn't find it.

 Because not all Arrays have searchable contents, for example Object[]