Thank you all of you guys gave me the replies..

yes i want to get the how many digit in the value. but i'm trouble with the big number. in my result there are about 40 numbers. i cant convert into int value, can you tell me what's the data type of bignumber result.

result is here:

150

`th`

of fibonacci value is :

9969216677189303386214405760200So how i get the 3rd number(6) value.?? please help me..