lua string to number

To convert a Lua string to a number, you can use the tonumber function. The function takes a string as an argument and returns the equivalent number.

Here's an example:

local str = "123"
local num = tonumber(str)

In this example, the variable str contains the string "123". The tonumber function is then used to convert this string to a number, which is stored in the variable num. If the string is not a valid representation of a number, tonumber will return nil.

This process involves the following steps:

1. Provide a string that represents a number.
2. Use the tonumber function to convert the string to a number.
3. Store the resulting number in a variable for further use.

This is the standard approach to converting a Lua string to a number.