Largest Even and Odd N-digit numbers

Given an integer N, the task is to find the largest even and odd N-digit numbers.

Examples:

Input: N = 4
Output:
Even = 9998
Odd = 9999



Input: N = 2
Output:
Even = 98
Odd = 99

Approach:

  • Largest N-digit even number will be (10n) – 2 because the series for different values of N will be 8, 98, 998, 9998, …..
  • Similarly, largest N-digit odd number will be (10n) – 1 for the series 9, 99, 999, 9999, …..

Below is the implementation of the above approach:

C++

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// C++ implementation of the approach
#include <bits/stdc++.h>
using namespace std;
  
// Function to print the largest n-digit
// even and odd numbers
void findNumbers(int n)
{
    int odd = pow(10, n) - 1;
    int even = odd - 1;
    cout << "Even = " << even << endl;
    cout << "Odd = " << odd;
}
  
// Driver code
int main()
{
    int n = 4;
    findNumbers(n);
  
    return 0;
}

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Java

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// Java implementation of the approach
class GFG {
  
    // Function to print the largest n-digit
    // even and odd numbers
    static void findNumbers(int n)
    {
        int odd = (int)Math.pow(10, n) - 1;
        int even = odd - 1;
        System.out.println("Even = " + even);
        System.out.print("Odd = " + odd);
    }
  
    // Driver code
    public static void main(String args[])
    {
        int n = 4;
        findNumbers(n);
    }
}

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C#

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// C# implementation of the approach
using System;
class GFG {
  
    // Function to print the largest n-digit
    // even and odd numbers
    static void findNumbers(int n)
    {
        int odd = (int)Math.Pow(10, n) - 1;
        int even = odd - 1;
        Console.WriteLine("Even = " + even);
        Console.Write("Odd = " + odd);
    }
  
    // Driver code
    public static void Main()
    {
        int n = 4;
        findNumbers(n);
    }
}

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Python3

# Python3 implementation of the approach



# Function to print the largest n-digit
# even and odd numbers
def findNumbers(n):

odd = pow(10, n) – 1
even = odd – 1
print(“Even = “, even)
print(“Odd = “, odd)

# Driver code
n = 4
findNumbers(n)

# This code is contributed by ihritik

PHP

Output:

Even = 9998
Odd = 9999


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Improved By : ihritik