Update Readme.md

ShrutiAgarwal31 · Sep 4, 2022 · 3d807b7 · 3d807b7
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 Concepts of Stack Data Structure.\
-LIFO - Last in First Out.\
-Only the top of the stack is the entry and the exit point.\
+  LIFO - Last in First Out.\
+  Only the top of the stack is the entry and the exit point.\
+  <br/>  
+ Operations in Stack.\
+    Push - add element to the stack.\
+    Pop -  remove element from the stack\
+    Peek - return the top element of the stack.\
+    isEmpty - Check whether the stack is empty or not.\
+    <br/>  
+  Application:\
+    Reverse of a string.\
+    Expression evaluation such as infix, prefix, postfix.\
+    Tower of Hanoi.
+