Question

define len what the type of len

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Answer 1

len() is a built-in function in python. You can use the len() to get the length of the given string, array, list, tuple, dictionary, etc. You can use len function to optimize the performance of the program. The number of elements stored in the object is never calculated, so len helps provide the number of elements.

Hope it helps.

Answer 2

Answer:

A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which are curved, by means of which light rays are refracted so that they converge or diverge to form an image.

There are two main types of lenses, known as convex (or converging) and concave (or diverging).