To slice an array, the following syntax is followed. Slicing is the process of selecting/calling a part of an array, given the beginning and ending indexes. How to Slice an Array? Slicing is the selection of a specific part of an array, rather than the entire array. The Slicing method iterates over the array from beginning to end (last index). ![]() It has no effect on the original array instead, it returns a reversed copy of the original array. This is the most basic and used method for reversing an array. The reversed() method will not be applicable to sets and iterators. Note that since reversed() returns an iterator, it only works with sequential objects. Also, while the reverse() just reverses the original array, reversed() does not affect the original array and returns an iterator, to reverse iterate over a sequence. While reverse() works on the same array, without consuming any extra memory space, reversed() needs a new array to store a copy of the reversed array. No!! Although the reverse() and reversed() perform the same function, they are different. You must be wondering what is the difference between the reverse() and reversed() method. Is it just about a 'd'? Reversing an array is one of the basic functions while programming and Python make it a lot easier!! How to Declare an Array in Python?īefore moving on to reversing an array, let's revise how we declare an array in Python. Since Python does not provide in-built arrays, the array module has to be imported in order to use arrays. Reversing an array literally means just reversing the order of array elements.Ĭheck out the image below to see what reversing an array looks like. For example, consider the example of a Palindrome number or printing reverse patterns! There are many scenarios that might demand the use of a reversed array in Competitive Programming. ![]() Sometimes, you might find the need to go through an array from the back. There are many problems where reversing an array can be considered a better brute-force solution than any other approach. While arrays have a defined number of elements, Lists are adaptable. Python doesn't have an in-built Array data structure, instead, it offers Lists. These languages provide the facility to declare and create an Array by defining the required memory size. If you are familiar with other programming languages like C, C++, and Java, you must be aware of the in-built Array data structure.
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