HEY GUYS THIS IS A CODE FOR STACK IMPLEMENTATION USING ARRAY DATA STRUCTURE. BEFORE USING ARRAY FOR CREATING A STACK YOU MUST HAVE SOME PREREQUISITE KNOWLEDGE LIKE: IN STACK INSERTION OF ELEMENTS TAKE PLACE FROM REARENF AND DELETION TAKE PLACE FROM FRONTEND. ALIKE HEAD POINTER IN LINKED LIST STACK TOO HAVE A POINTER CALLED"TOP" WHICH POINTS TO THE TOP MOST ELEMENT OF THE STACK. TAKE TOP INITIAL/DEFAULT VALUE AS -1 SINCE IT INCREMENT BY 1 DURING INSERTION AND DECREMENTS BY 1 DURING DELETION. STACK UNDEFLOW:THIS OCCURS WHEN TOP=-1 AND WE ARE PERFORMING POP OPERATION. STACK OVERFLOW:LET ARRAY SIZE IS 5 AND WE ARE ABOUT TO PERFORM PUSH OPERATION FOR 6TH TIME IN THIS CASE WE GET STACK OVERFLOW.