What is a filter and main purpose in filter useing?

Question

Filters

Answer 1

If you mean filter in python,ruby or js then its purpose is to remove numbers in a range that don't meet a specific condition.

Answer 2

Hi, the filter is brightness

Answer 3

If you mean filter in CSS, then: "The CSS filter property lets you apply graphical effects like blurring or color shifting to an element."

Answer 4

Well in web designing :

The CSS filter property lets you apply graphical effects like blurring or color shifting to an element.
Filters are commonly used to adjust the rendering of images, backgrounds, and borders.

and in python or js we use filters to obtain a particular result according to a condition.
syntax in py: filter(condition, object->list , tuple etc.)