CODE EXAMPLE FOR PYTHON

find missing number in the array

// Java program to find missing Number
 
import java.util.*;
import java.util.Arrays;
 
class GFG {
 
    // Function to find the missing number
    public static int getMissingNo(int[] nums, int n)
    {
        int sum = ((n + 1) * (n + 2)) / 2;
        for (int i = 0; i < n; i++)
            sum -= nums[i];
        return sum;
    }
 
    // Driver code
    public static void main(String[] args)
    {
        int[] arr = { 1, 2, 3, 5 };
        int N = arr.length;
        System.out.println(getMissingNo(arr, N));
    }
}