Stack is a special type of collection that stores elements in LIFO style (Last In First Out). C# includes the generic Stack<T> and non-generic Stack collection classes. It is recommended to use the generic Stack<T> collection.

Stack Pancake House

Stack is useful to store temporary data in LIFO style, and you might want to delete an element after retrieving its value.

Stack<T> Characteristics

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• Stack<T> is Last In First Out collection.
• It comes under System.Collection.Generic namespace.
• Stack<T> can contain elements of the specified type. It provides compile-time type checking and doesn't perform boxing-unboxing because it is generic.
• Elements can be added using the Push() method. Cannot use collection-initializer syntax.
• Elements can be retrieved using the Pop() and the Peek() methods. It does not support an indexer.

Stacked Leggings

Creating a Stack

You can create an object of the Stack<T> by specifying a type parameter for the type of elements it can store. The following example creates and adds elements in the Stack<T> using the Push() method. Stack allows null (for reference types) and duplicate values.

You can also create a Stack from an array, as shown below.

Stack<T> Properties and Methods:

Pop()

The Pop() method returns the last element and removes it from a stack. If a stack is empty, then it will throw the InvalidOperationException. So, always check for the number of elements in a stack before calling the Pop() method.

Peek()

The Peek() method returns the lastly added value from the stack but does not remove it. Calling the Peek() method on an empty stack will throw the InvalidOperationException. So, always check for elements in the stack before retrieving elements using the Peek() method.

Stackmaster Cookware

Contains()

Stackable Washer And Dryer

The Contains() method checks whether the specified element exists in a Stack collection or not. It returns true if it exists, otherwise false.

• • Field Summary

    • Fields inherited from class java.util.Vector

      capacityIncrement, elementCount, elementData

    • Fields inherited from class java.util.AbstractList

      modCount

  • Constructor Summary

    Constructors

    Constructor and Description
    Stack()

  • Method Summary

    All MethodsInstance MethodsConcrete Methods

    Modifier and Type	Method and Description
    boolean	empty() Tests if this stack is empty.
    E	peek() Looks at the object at the top of this stack without removing it from the stack.
    E	pop() Removes the object at the top of this stack and returns that object as the value of this function.
    E	push(E item)
    int	search(Object o) Returns the 1-based position where an object is on this stack.

    • Methods inherited from class java.util.Vector

      add, add, addAll, addAll, addElement, capacity, clear, clone, contains, containsAll, copyInto, elementAt, elements, ensureCapacity, equals, firstElement, forEach, get, hashCode, indexOf, indexOf, insertElementAt, isEmpty, iterator, lastElement, lastIndexOf, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeAllElements, removeElement, removeElementAt, removeIf, removeRange, replaceAll, retainAll, set, setElementAt, setSize, size, sort, spliterator, subList, toArray, toArray, toString, trimToSize

    • Methods inherited from class java.lang.Object

      finalize, getClass, notify, notifyAll, wait, wait, wait

    • Methods inherited from interface java.util.Collection

      parallelStream, stream