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