# How to execute a function each time the slider is dragged?

I've created a function f and a slider:

Slider[Dynamic[y],{1,4}]


How to execute/call f each time the slider is dragged?

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Still no code formatting or capitalization in your original question (other people were kind enough to edit)... –  Ajasja Dec 12 '12 at 14:14

Like this

Slider[Dynamic[y,(y=#;f[y])&],{1,4}]


You can can test using for example

f[y_]:=Print@y;


I advise you to look at the help of Dynamic that contains examples of other related features.

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Another rout to take would be just using Manipulate. It will update content inside of it automatically in addition to automatically creating an interface.
f[y_] := y