Final answer:
The range of the optional base on the tonumber function depends on the programming language.
Step-by-step explanation:
The tonumber function is a built-in function in programming languages that converts a given value into a number. The range of the optional base that can be used with the tonumber function depends on the programming language.
For example, in Lua programming language, the tonumber function can accept an optional base parameter ranging from 2 to 36. This means that you can specify a base between 2 and 36 to convert a string representation of a number in that particular base into a decimal number.
However, it's important to note that the range of the optional base may vary in different programming languages, so it's always recommended to refer to the documentation or specific language specifications for accurate information.