This library lets you do arbitrary precision (big number) arithmetic.
Big numbers have a metatable attached to them so you can add, subtract, divide, multiply, raise to a power, and compare them in the usual way. You can also use bc.add, bc.sub, bc.div, bc.mul, and bc.pow to do the same operations.
Thus, the following two forms are equivalent:
bc.digits (20)
a = bc.number (2)
print (bc.sqrt (a)) --> 1.41421356237309504880
print (a:sqrt ()) --> 1.41421356237309504880
Also see:
- The math library for other mathematical operations.
- The bit library for bitwise operations.
Some useful constants are:
e = 2.7182818284590452353602874713526624977572470936999595749669676277240766303535
pi = 3.1415926535897932384626433832795028841971693993751058209749445923078164062862
radians = degrees * pi / 180
See Also ...
Topics
Lua base functions
Lua bit manipulation functions
Lua coroutine functions
Lua debug functions
Lua io functions
Lua math functions
Lua os functions
Lua package functions
Lua PCRE regular expression functions
Lua script extensions
Lua string functions
Lua table functions
Lua utilities
ScriptingLua functions
bc.add (Addition)
bc.compare (Comparison)
bc.digits (Digits after the decimal place)
bc.div (Division)
bc.isneg (Tests if negative)
bc.iszero (Tests if zero)
bc.mod (Modulus)
bc.mul (Multiplication)
bc.number (Create a big number)
bc.pow (Power)
bc.sqrt (Square root)
bc.sub (Subtraction)
bc.tostring (Converts to a string)
bc.version (Version)(Help topic: general=lua_bc)
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