If the text for which you want to know the font type is editable, you can identify it using it's related application. If it is on a website, you can usually find it by viewing it's HTML source. If the character is in an offline source like a newspaper, it would take a human font expert to identify a complex font type OR you can turn to two free online resources -
On the WhatTheFont website you would need to submit the digitized form of the offline source like a scanned or photographed image of the text containing the font or submit the URL containing the image.
To let Identifont find the typeface you have to answer approximately twelve questions questions to get the closest match in their huge database of typefaces.