mirror of https://github.com/rm-dr/daisy
1.7 KiB
1.7 KiB
A high-precision scientific calculator with support for units, derivatives, and more.
Many features are missing, this is still under development.
Features
- Open-source
- Extremely high precision
- Uses a rational datatype when possible, and a high-precision float when not.
- Pretty printing in prompt (with special substitutions)
- Supports many physical units, with metric and binary prefixes
- Supports exponential notation
- Clear syntax, parsed input is always re-printed as a sanity check.
- Useful, detailed error messages
Usage
All documentation is built into the prompt. Use the help command to view it.
Evaluate expressions:
- Basic math:
103 / 2 * 43 - Functions:
sqrt(1.4^3 + 4) * sin(pi / 4) - Scientific notation:
1.2e12 * 1e-5
Physical units
- Unit operations:
2 day + 1 hour - Unit conversion:
2 day + 1 hour to minutes - Compound units:
10 m/s to mph - Conversion errors:
1 liter to volt
Varables
- Previous answer:
ans + 2 - Variable assignment:
a = 143
Notes and Tricks
Unit Conversion
The conversion operator to converts its left argument to the unit of its right argument, ignoring its value. For example, 5m to mi and 5m to 10mi are identical.
Multiplication Order
Implicit multiplication has a higher priority than division. 1/2 pi will parse as 1/(2pi). Type (1/2) pi or 1/2 * pi to get half of pi.
Inline Assignment
The assignment operator = returns its value, and can thus be used inside of an expression. For example, (a = 2) + 2 assigns a to 2 and returns 4. This only works for variable assignment.