Peek simply returns the value of what is on top of the stack. In contrast to this, pop will remove the value from the stack and then return it.

Is top and peek same?

peek() & top() functions are same but peek() is unavailable in std::stack . You can check it here- . Actually, peek() and top() both take O(1) time without any other queries.

What is peek and pop in Java?

Stack peek() Method in Java

Stack. peek() method in Java is used to retrieve or fetch the first element of the Stack or the element present at the top of the Stack. The element retrieved does not get deleted or removed from the Stack. Syntax: STACK.peek() Parameters: The method does not take any parameters.