peek

public T+ peek()

The element at the top of the stack (most recently added element) or undefined if the stack was empty.

Returns the most recently added element from the stack without removing it. If the stack is empty, undefined will be returned.

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import System;   auto stack = new Stack<int>([ 1, 2 ]); Console.log(stack.peek()); // 2 Console.log(stack.peek()); // 2