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stack::top() function in C++ STL

In C++, the standard library gives us the facility to use the Stacks as a type of container adaptors with LIFO type of working. The stack::top() is a C++ Standard Library function which is used to get the top element of the stack.

Syntax:

Stack_Name.top( );

Parameter: The stack::top() function does not accepts any parameter.

Return value: The stack::top() function returns the current top element of the stack container.

Example of stack::top() Function

#include <iostream>

#include <stack>

using  namespace std;

int  main()

{

stack<int> STK;

STK.push(10);

STK.push(20);

STK.push(30);

while  (!STK.empty())

{

cout << STK.top()  <<  ' ';

STK.pop();

}

}

Output

30 20 10