WoW:API tonumber: Difference between revisions

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{{luaapi}}
Attempts to parse the number expressed in a string
num = tonumber(str[, radix])


Native Lua statement:
== Arguments ==
; str : String/number - this value will be converted to a numeric value.
; radix : Number - An optional argument specifies the base to interpret the numeral. The base may be any integer between 2 and 36, inclusive. In bases above 10, the letter `A´ (in either upper or lower case) represents 10, `B´ represents 11, and so forth, with `Z´ representing 35. In base 10 (the default), the number may have a decimal part, as well as an optional exponent part. In other bases, only unsigned integers are accepted.


;''Arguments''
== Returns ==
:'''tonumber(arg {,base})'''
; num : Number/nil - The argument as a numeric value or '''nil''' if the value cannot be converted.
::'''arg''' - this value will be converted to a numeric value.
::'''base''' - An optional argument specifies the base to interpret the numeral. The base may be any integer between 2 and 36, inclusive. In bases above 10, the letter `A´ (in either upper or lower case) represents 10, `B´ represents 11, and so forth, with `Z´ representing 35. In base 10 (the default), the number may have a decimal part, as well as an optional exponent part. In other bases, only unsigned integers are accepted.


----
==Examples==
;''Returns''
tonumber("123") -- Returns 123


:: The argument as a numeric value or '''nil''' if the value cannot be converted.
tonumber("argqerg")  --Returns nil


----
tonumber("argqerg", 36)  --Returns 4294967295
;''Examples''


  tonumber("123")
  tonumber("13", 8) --Returns 11
--Returns 123


  tonumber("argqerg")
  tonumber ("D", 16) --Returns 13
--Returns nil


tonumber("13", 8)
== Notes ==
--Returns 11
* This function always converts ''arg'' into the native number type.
 
: If you want to convert from one base to another, you'll have to do the math yourself.
tonumber ("D", 16)
* If ''base'' is less than 2 or greater than 36, an error will be thrown ("Base out of range").
--Returns 13
* If ''arg'' cannot be converted from ''base'' to decimal, nil will be returned.
 
{{LUA}}

Latest revision as of 04:47, 15 August 2023

← WoW Lua

Attempts to parse the number expressed in a string 

num = tonumber(str[, radix])

Arguments[edit]

str
String/number - this value will be converted to a numeric value.
radix
Number - An optional argument specifies the base to interpret the numeral. The base may be any integer between 2 and 36, inclusive. In bases above 10, the letter `A´ (in either upper or lower case) represents 10, `B´ represents 11, and so forth, with `Z´ representing 35. In base 10 (the default), the number may have a decimal part, as well as an optional exponent part. In other bases, only unsigned integers are accepted.

Returns[edit]

num
Number/nil - The argument as a numeric value or nil if the value cannot be converted.

Examples[edit]

tonumber("123") -- Returns 123

tonumber("argqerg")  --Returns nil

tonumber("argqerg", 36)  --Returns 4294967295

tonumber("13", 8) --Returns 11

tonumber ("D", 16) --Returns 13

Notes[edit]

  • This function always converts arg into the native number type.
If you want to convert from one base to another, you'll have to do the math yourself.
  • If base is less than 2 or greater than 36, an error will be thrown ("Base out of range").
  • If arg cannot be converted from base to decimal, nil will be returned.
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