The Niklas Lindblad Organisation

Sometimes it can be handy to calculate the number of digits in an integer for various mathematical calculations.

In C++

#include <math.h>
 
double len(double n) {
        if n == 0:
                 return 1
 
        double l = floor ( log10 ( n ) ) + 1; /* Number of digits in n */
        long unsigned int len = int(l); /* Save it to an integer instead */
 
        return len;
 
}

In Python

from math import log10, floor
 
def length(n):
     if ( n == 0 ) { return 1; }
     return floor( log10( n ) ) + 1

This entry was posted on Friday, January 19th, 2007 at 8:10 pm and is filed under Writing. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.