The various operations that are performed on the stack are
CREATE(S) – Creates S as an empty stack.
PUSH(S,X) – Adds the element X to the top of the stack.
POP(S) – Deletes the top most elements from the stack.
TOP(S) – returns the value of top element from the stack.
ISEMTPTY(S) – returns true if Stack is empty else false.
ISFULL(S) – returns true if Stack is full else false.
