E-Calc

An ISO Extended Backus-Naur Form (EBNF) specification for calculations and assignment expressions.

• Author: Ethan Kletschke
• Version: 1.0.0
• Developed on: Ubuntu (WSL2)
• License: MIT

This Repository is Archived!

No more updates will be made to E-Calc as of 2026-08-28.

Definitions

E-Calc defines:

• The entire English alphabet from A-Z (uppercase and lowercase)
• The digits 0-9
• Signs (+ and -)
• Integers with optional signs
• Simple assignment of values to variables (RHS assigned to LHS, or lhs = rhs)
• Arithmetic operators
• Exponentiation

Limitations

E-calc is intentionally simple. As such:

• E-Calc has no parentheses or BODMAS precedence
• E-calc is not a full language spec