bit.tonumber
Convert a string into a number
Prototype
n = bit.tonumber (s, base)Description
This takes a string, and converts it into a number. Unlike the standard Lua tonumber function this function will handle up to a 52-bit number (the default Lua number conversion will only go to 32-bit numbers).
eg.
Because of limitations in the size of a floating point number, the maximum string value that can be converted is a 52 bit number, ie: hex FFFFFFFFFFFFF (decimal 4503599627370495).
Leading whitespace is skipped. After that, there can be an optional + or - sign.
eg.
print (bit.tonumber ("A7C5AC471", 16)) --> 45035996273
Because of limitations in the size of a floating point number, the maximum string value that can be converted is a 52 bit number, ie: hex FFFFFFFFFFFFF (decimal 4503599627370495).
Leading whitespace is skipped. After that, there can be an optional + or - sign.
Lua functions
- bit.ashr - Shifts a number right, preserving sign
- bit.band - Bitwise 'and'
- bit.bor - Bitwise 'or'
- bit.clear - Clears one or more bits
- bit.mod - Bitwise 'modulus' (remainder after integer divide)
- bit.neg - Bitwise 'negate' (ones complement)
- bit.shl - Shifts a number left
- bit.shr - Shifts a number right
- bit.test - Bitwise 'test'
- bit.tostring - Convert a number into a string
- bit.xor - Bitwise 'exclusive or'
Topics
- Lua LPEG library
- Lua PCRE regular expression functions
- Lua base functions
- Lua bc (big number) functions
- Lua bit manipulation functions
- Lua coroutine functions
- Lua debug functions
- Lua io functions
- Lua math functions
- Lua os functions
- Lua package functions
- Lua script extensions
- Lua string functions
- Lua syntax
- Lua table functions
- Lua utilities
- Scripting callbacks - plugins
- Scripting