worksheet function - Create a hyperlink from URL and title in Excel

I'm trying to construct a hyperlink from a URL and a name in different cells.

a1 = http://www.example.com/
b1 = example
c1 = example

What I want that is the URL in A1 to is made into a hyperlink with the name taken from B1:

example

I created a formula, but it's not working

&”=b1”

should result in

example