Counting Integers Algorithm

[Matth963]

int numdigits(int num){

int len = 0;

while(num >= 10){
num = num/10;
len++;
}

return len;
}

This algorithm is used to count the number of digits but I can't understand it.
Someone explain it to me please :D

Thanks

[JamesCherrill]

Add print statements after each line to print out the values that were set/changed on that line. Then you'll be able to understand how it works.

[Matth963]

Thanks a lot!

[hfx642]

Well... It works, but it will be 1 digit short.