CMD Calculator: Fast Command-Line Math Tool

CMD Calculator: Fast Command-Line Math Tool

What it is

• A lightweight command-line utility for performing arithmetic and basic math operations directly in the terminal.

Key features

• Fast startup: Minimal dependencies, launches instantly from shell.
• Basic operations: Addition, subtraction, multiplication, division, modulus, exponentiation.
• Operator precedence: Supports parentheses and standard precedence.
• Floating-point support: Decimal calculations with configurable precision.
• Scripting-friendly: Read expressions from stdin or files; usable in shell scripts.
• Interactive REPL: Optional interactive mode for repeated calculations.
• History & aliases: Command history and user-defined shortcuts for frequent expressions.
• Platform support: Works on Linux, macOS, and Windows (via WSL or native builds).

Example usage

• One-off expression:

Code
Copy CodeCopied
cmdcalc “12.5(3 + 4)” 

• From pipe:

Code
Copy CodeCopied
echo “scale=4; 22 / 7” | cmdcalc 

• Interactive mode:

Code
Copy CodeCopied
cmdcalc –interactive > 2^10 1024 

Typical use cases

• Quick arithmetic without opening a GUI calculator.
• Embedding in scripts for lightweight numeric processing.
• Learning tool for shell users to practice math expressions.
• Batch-processing lists of numbers or expressions.

Alternatives

• bc (POSIX calculator), Python/Ruby one-liners, zcalc (shell calculator), calc.

When to choose CMD Calculator

• Prefer when you need extremely fast, no-friction math in terminal workflows, simple scripting integration, and a small footprint.