How do I find the length of a number using NCalc built- in functions?

Question

I am using NCalc in my project to evaluate expressions. The framework includes a set of already implemented functions which can be found here.

I am interested in calculating the length of a number or a string. Can I achieve that using just the built-in functions?

Answer 1

For getting length of an integer number, you can do something like this-

int length = ceiling(log10(number));

But a method like this will be much efficient-

int countLength(int number){
    if(number>9) return countLength(number/10) + 1;
    return 1;
}