How an API works: a menu, a request, a known answer

How an API works: a menu, a request, a known answer

An API is a menu your app orders from.

It picks one request, fills in the blanks (here: latitude, longitude, temperature), and gets data back in the same shape every time. It never sees the code inside.

This one is a real call: London, 19.0 °C, 3 October at 13:00.

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