How to use the value returned from Position as index for another list?

say, I want to find an index of a specific element in a list using

Position[{a, b, c, d, e, f}, c]

and it returns {{3}}

How can I use this returned value as index to pick a certain element from another list? How can I convert {{3}} to an integer or is there any other way to achieve what I want to do?

Thanks in advance!

Answer

If you put your cursor on the Position command and press F1 for help, you will see the following under Properties and Relations: "Use Extract to extract parts based on results from Position." There is also an example. For your case:

p = Position[{a, b, c, d, e, f}, c]
Extract[list,p]

where list is the list you want to extract from.

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