GeezerVison is showing github.com — Java/NumberOfDigit.java at main · am-opensource-learner-void/Java

Expand file tree

NumberOfDigit.java

Copy path

More file actions

21 lines (20 loc) · 610 Bytes

Copy path

21 lines (20 loc) · 610 Bytes

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

// This program demonstrates a new and most efficient way to calculate number of digits by using logarithmic functions

/* the normal and most used algorithm to calculate number of digits is

while(num>0){

numberOfDigits=num%10;

numberOfDigits++;

num=num%10;

}

this algorithm has a time complexity of O(n)

we can simply calculate it by log(number)+1.

here is the code for it :- */

import java.util.*;

class NumberOfDigit

{

public static void main(String args[])

{

int num=356, digits=0;

digits = (int)Math.log10(num) + 1;

System.out.println(digits);

}