Two Variable Calculator

This tool provides a minimal, purpose-built calculator for two numeric inputs, x and y, and a chosen binary operator. It targets users who need fast verification of simple expressions without spreadsheets.
Conceptually, the engine treats the inputs as scalar quantities and applies a single operation between them, producing a deterministic result that can be reused in subsequent calculations.
The core value lies in speed, determinism, and predictable formatting, making it suitable for quick prototyping, teaching, or on-the-fly checks during analysis.
Core features include input validation, support for a range of operators (+, -, *, /, ^, %, min, max), and clear signaling when an input or operation is invalid. This tool does not perform symbolic math, equation solving, or multi-step algebra; it focuses on binary evaluation and reproducible outcomes.
Typical use cases are classroom exercises, data sanity checks, budgeting scenarios, and engineering quick tests where two numeric values must be combined with a defined rule.