calculator

A calculator with a support for functions (and fractions - thanks to Clojure).

Setup

Clojure and Leiningen have to be installed and configured.

Run tests:

lein test

Run the calculator:

lein run

Run as a standalone JAR:

lein uberjar
java -jar target/uberjar/calculator-_VERSION_-standalone.jar

Usage

When you run the calculator, you may type in an mathematical expression you want to evaluate, eg. ((8.0 - log(2, 16))^3! + 2*52) /100, or a command.

Available commands

• help, h or ?: Show help
• exit, quit or q: Exit the calculator

Supported features

operators

• +
• - (both subtraction and unary negation)
• *
• /
• ^ (power)
• ! (factorial)

functions

• nth root
  • sqrt(x)
  • cbrt(x)
• logarithms
  • log(base, x)
  • ln(x)
  • log10(x)
  • log2(x) or lb(x)
• goniometric
  • sin(x)
  • cos(x)
  • tan(x) or tg(x)
  • cot(x) or cotg(x)
• rounding
  • round(x)
  • floor(x)
  • ceil(x)
• other
  • abs(x)
  • sgn(x) (signum function)
  • double(x)

contants

• pi
• e
• phi or golden_ratio

special characters

• parentheses: (...) or [...]
• separator (between function arguments): , or ;