![]() The stack follows the principle LIFO i.e. The insertion or deletion of any item is done from the same end of the stack.Ģ. Print "Enter the element to be inserted: "ġ. OUTPUT: The stack after pushing or popping the elementsĪddress part to store the address of the next nodeĭeclaring a global variable ‘head’ of type ‘node’ĭeclaring a global variable ‘top’ of type integer Here the variable ‘top’ is used to check the overflow and underflow condition of the stack. Now, if we make the address of the node ‘ptr1’ NULL, the link with the pointer ‘ptr’ will be de touched. After that, the connection of that node with the previous node will be removed. Now, suppose we want to pop the element from the stack, first the element ‘ 20 ’ will be popped out as it was inserted last.įor deleting the element from the linked list, a pointer is pointed at the last element of the list which is considered as ‘top’ of the stack. When the stack will be full it will show the “ stack overflow ” error while trying to insert an element. Similarly, the elements can be inserted into the stack as well as the array. The linked list after inserting the element ‘ 20 ’. Suppose the element to be inserted is 20. ![]() The linked list will be:įor the second element, the top will be incremented again by 1 and the same process will be followed. The stack will be:įor implementing this using a linked list, first, one node is to be created and the head pointer will point to that node. Before inserting the ‘top’ will be incremented by 1. ![]() Now, suppose the first element to be inserted into the stack is 10. Let the stack can contain a maximum of 3 elements.Īs the stack is implemented here using a linked list, first the head pointer is set to NULL as there is no element in the stack. Similarly, when the stack is emptyand someone is trying to delete an element from the stack then this condition is known as stack underflow. When the stack is fulland someone is trying to insert an element into the stack then this condition is known as stack overflow. First, the maximum number of elements of the stack is taken to check the boundary conditions - overflow or underflow. An array is also a linear data structure. Here, the array is used to implement the stack data structure. The insertion of any element into the stack is called ‘ push ’ and the deletion of an element is called ‘ pop ’. # The bottom-most plate which has been kept first will remain there and will be taken out at the last. which is put on the stack at last) will be taken first. The plate which is placed at the top (i.e. # The stack of plates in the kitchen can be a very simple and common example of a stack data structure. There are various real-life examples of the stack. # The element that is inserted at the last will be deleted at the first. Generally, the stack uses the LIFO approach i.e. It is a linear data structure and has a particular order of performing the operations. So go ahead and start experimenting with stacks in your own projects! With practice, you'll become a master of this powerful data structure in no time.# The stack is an abstract data type. Stacks can be used to solve a wide range of problems and can be especially useful in algorithmic problems and data processing tasks. We also explored some common use cases for stacks in Python programming, including checking for balanced parentheses, reversing a string, and depth-first search.īy understanding how stacks work and how to use them, you can add a powerful tool to your programming arsenal. Then, we went on to implement a stack using a Python list and using a custom Stack class. We started by understanding what a stack is and how it works. In this article, we have learned how to implement a stack data structure in Python.
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