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Input : {[]{()}} Output : Balanced Input : [{}{}(] Output : Unbalanced Approach #1 : Using stack. One approach to check balanced parentheses is to use stack. Each time, when an open parentheses is encountered push it in the stack, and when closed parenthesis is encountered, match it with the top of stack and pop it. If stack is empty at the end ...Jul 26, 2021 · Function (String containing brackets) # e.g "(({[]}))" check if the string length is odd or even. if odd return false. # since the parentheses come in pairs initialize variables [index = 0, is_balanced = True, n = string_length] Loop while index < n and is_balanced = True: get the bracket in string using the index we are at. The ability to differentiate between parentheses that are correctly balanced and those that are unbalanced is an important part of recognizing many programming language structures. The challenge then is to write an algorithm that will read a string of parentheses from left to right and decide whether the symbols are balanced.« Java Tutorial Java Examples ». This article contains a program in Java to check whether the expression has balanced parentheses or not. That is, the program helps in checking whether brackets used in an expression such as (, ), {, }, [, ] are in balance or not.. The expression will be in balanced parentheses, if there is an opening (, {, or [, then there must be a closing ), }, or ].