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MissingNumber.java

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MissingNumber.java

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/*

* To change this license header, choose License Headers in Project Properties.

* To change this template file, choose Tools | Templates

* and open the template in the editor.

*/

package missingnumber;

/**

*

* @author harini-geek

*/

public class MissingNumber {

/**

* @param args the command line arguments

*/

private static int sumOfNumbers(int n){

return (n*(n+1)/2);

}

private static int sumOfElements(int a[]){

int sum = 0;

for(int i=0;i<a.length;i++){

sum += a[i];

}

return sum;

}

public static void main(String[] args) {

// TODO code application logic here

int a[] = {1,2,3,5,6};

int n = 6;

System.out.println("Missing Number "+(sumOfNumbers(n) - sumOfElements(a)));

}

}