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Program to Count numbers on fingers
  • Difficulty Level : Easy
  • Last Updated : 15 Jun, 2021

Count the given numbers on your fingers and find the correct finger on which the number ends. 
 

  • The first number starts from the thumb, second on the index finger, third on the middle finger, fourth on the ring finger, and fifth on the little finger.
  • Again six comes on the ring finger and so on.
  • Here we observer a pattern, 8(last number) and 2 ends up in 2nd position, 3rd or 7th on the middle finger, and so on.
  • The pattern keeps repeating after every 8 numbers
    • 1 to 8
    • 9 to 16
    • 17 to 24, and so on

 

Examples: 
 

Input : 17
Output :1

Input :27
Output :3

 



 

C++




// CPP Program to Count numbers on fingers
#include <iostream>
using namespace std;
 
int count_num_finger(int n)
{
    int r = n % 8;
    if (r == 0)
        return 2;
    if (r < 5)
        return r;
    else
        return 10 - r;
}
 
// Driver code
int main()
{
    int n;
    n = 30;
    cout << count_num_finger(n);
 
    return 0;
}

Java




// Java Program to Count numbers on fingers
class GFG
{
static int count_num_finger(int n)
{
    int r = n % 8;
    if (r == 0)
        return 2;
    if (r < 5)
        return r;
    else
        return 10 - r;
}
 
// Driver Code
public static void main(String[] args)
{
    int n;
    n = 30;
    System.out.println(count_num_finger(n));
}
}
 
// This code is contributed
// by Mukul Singh

Python3




def count_num_finger( n ):
    r = n % 8
    if r == 0:
        return 2
    if r < 5:
        return r
    else:
        return 10 - r
 
# Driver Code
n = 30
print(count_num_finger(n))
 
# This code is contributed by "Sharad_Bhardwaj".

C#




// C# Program to Count numbers on fingers
using System;
     
class GFG
{
     
static int count_num_finger(int n)
{
    int r = n % 8;
    if (r == 0)
        return 2;
    if (r < 5)
        return r;
    else
        return 10 - r;
}
 
// Driver Code
public static void Main(String[] args)
{
    int n;
    n = 30;
    Console.WriteLine(count_num_finger(n));
}
}
 
// This code is contributed by Princi Singh

PHP




<?php
function count_num_finger( $n )
{
    $r = $n % 8;
    if ($r == 2)
        return 0;
    if ($r < 5)
        return $r;
    else
        return 10 - $r;
}    
 
// Driver Code
$n = 30;
echo(count_num_finger($n));
 
// This code is contributed
// by Aman Ojha
?>

Javascript




<script>
    // Javascript Program to Count numbers on fingers
     
    function count_num_finger(n)
    {
        let r = n % 8;
        if (r == 0)
            return 2;
        if (r < 5)
            return r;
        else
            return 10 - r;
    }
     
    let n;
    n = 30;
    document.write(count_num_finger(n));
  
// This code is contributed by mukesh07.
</script>

Output: 
 

4

Asked in Paytm Campus Placement August 2017 
This article is contributed by Dinesh Malav. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
 




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