![]() ![]() ![]() isEmpty(): If the stack is empty, then this function will return a true value or else it will return a false value.Like pop(), it returns the value of the topmost element but does not remove that element from the stack. peek()/top(): This function returns the value of the topmost element available in the stack.In the pop() function, we do not have to pass any argument. pop(): It is an operation in which the elements are deleted from the top of the stack.In the push function, we need to pass an element which we want to insert in a stack. push(x): It is an operation in which the elements are inserted at the top of the stack.The following are the operations that can be performed on the stack: The two operations are performed in LIFO, i.e., push and pop operation. ![]() In stack, we can insert the elements of a similar data type, i.e., the different data type elements cannot be inserted in the same stack. It follows the principle LIFO (Last In First Out) in which the insertion and deletion take place from one side known as a top. It is a container that follows the insertion and deletion rule. In case of an array, random access is possible, i.e., any element of an array can be accessed at any time, whereas in a stack, the sequential access is only possible. What is a Stack?Ī Stack is a linear data structure. First, we will look at what is stack and what is queue individually, and then we will discuss the differences between stack and queue. ![]()
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