push(x)
O(1) Time. Inserts element `x` at the Top of the stack. If using a fixed-size array, you must check for Overflow before inserting.
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A high-level overview of the standard methods available on a Stack data structure across most programming languages.
O(1) Time. Inserts element `x` at the Top of the stack. If using a fixed-size array, you must check for Overflow before inserting.
O(1) Time. Removes and returns the element at the Top of the stack. You must check for Underflow (IsEmpty) before popping.
O(1) Time. Returns the value of the element at the Top of the stack without removing it. Crucial for checking the current state.
O(1) Time. Returns a boolean indicating whether the stack contains any elements. In array implementations, this is true if `top == -1`.