👉 Stack mathematics, also known as stack arithmetic or push-eval-apply (PEA) style computation, is a method for evaluating mathematical expressions that leverages the Last-In-First-Out (LIFO) nature of stacks. In this approach, operators and operands are pushed onto a stack when encountered in an expression, and when the expression is evaluated, operands are popped from the stack, operations are performed, and results are pushed back. This allows for efficient evaluation of complex expressions by breaking them down into simpler, sequential steps, much like how a stack works—last items added are the first to be removed. This method is particularly useful for parsing and evaluating mathematical expressions with nested operations, as it naturally aligns with the hierarchical structure of arithmetic and logical operations.
