Program to convert infix to postfix in data structure

Step 2: Then we scan the input expression from left to right and we repeat step 3 to 6 for each element of the input expression until the stack is empty. Step 4: If we encounter the left or opening parenthesis the we push it into the stack. We repeatedly check the precedence of incoming operator with the top of stack if the precedence of it is higher than the top of the stack then we simply add it into the stack else we pop the top of stack and add it into the output expression then again check the incoming operator precedence with the new of the top of stack.

If the precedence of both operators incoming operator and the top of the stack are same then use associativity rule. We repeatedly pop the operator from the stack and add it to the output expression until the left parenthesis is encountered. Servlet technology is robust and scalable because of java language. The Struts 2 framework is used to develop MVC based web applications.

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