![]() ![]() Thus, it would be safe to say that the usage of range(len()) depends on the requirement of the code. So, this is where range(len()) comes in handy to solve the problem. Here, you need the help of the indices of the each item in the list, to compute the index of an element, the index of the next element and the index of the previous element. It wouldn’t be possible to solve this problem if you simply access the elements of the list. ![]() If current_node < left_node and current_node < right_node: Have a look at the following piece of code that filters out the numbers from a list which are less than both the left and the right neighbors. This is a better and more Pythonic way of accessing the elements from the list directly instead of using their index. If you want to simply iterate across a list you can probably use a simple for loop to iterate across each item of the list one by one like so: “for x in list”. Question: Is there a need for range(len(li))? Learn more about the len() function here: Python range() Function - A Helpful Illustrated Guide Or you can pass start, stop, and step arguments in which case the range object will go from start to step using the given step size. You can pass either only a stop argument in which case the range object will include all integers from 0 to stop (excluded). The Python range() function creates an iterable of subsequent integers within a given range of values.Learn more about the len() function here: Python len() The type of the returned value is an integer that represents the number of elements in this iterable. Python’s built-in function len() returns the length of the given string, array, list, tuple, dictionary, or any other iterable.These numbers can then be used as indices of the given list such that you can access each item in the list using its index with the help of a for loop. Now, when you apply the range function upon len(li) as range(len(li)) it creates a squence of numbers from 0 up to len(li)-1. Now, let’s visualize the answer to this to understand how this can be implemented in the code: li = Įxplanation: In the above solution len(li) is used to find the length of the given list. Generally, range(len()) allows you to iterate across a given iterable/sequence to access each item of the sequence with the help of its index. Now, this brings up a couple of questions – (i) Why do we use range(len())? (ii) How do we use range(len())? □ Solution Have you come across the usage of range(len()) while trying to iterate across all the items of a given iterable? ![]()
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