Solution: Basic Calculator
Explore how to build a basic calculator solution by applying stack data structures in JavaScript. Understand how to evaluate nested arithmetic expressions containing addition, subtraction, and parentheses by processing input step-by-step and managing intermediate results with stack operations. Learn to handle digits, operators, and subexpressions efficiently in a single pass for optimal performance.
Statement
Given a string containing an arithmetic expression, implement a basic calculator that evaluates the expression string. The expression string can contain integer numeric values and should be able to handle the “+” and “-” operators, as well as “()” parentheses.
Constraints:
Let s be the expression string. We can assume the following constraints:
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s.length