Missing number program in java

Answer 1

Vijay Maurya ,

▪︎before we are going to help you, please present your attempt here.
    if you haven't done a try by yourself so far, please do so. create your code in playground and post the link to it here.

▪︎please also provide a proper task description with sample of input and output.

▪︎if your question is related to a code coach exercise,  please mention the tutorial name and the exercise number.

thanks!

Answer 2

Missing brain post in Q&A.

Answer 3

Hi, please link your code attempt so we can help you to solve it!

Simon Sauter ++🧠;

Answer 4

System.out.println("Missing Number");

Done.

Answer 5

Vijay Maurya

Write in same code so we can debug problem.

Answer 6

I have add swap code now you can check

Answer 7

public class MissingNumber {
public static void main(String[] args) {
int[] arr = {0,2};
sort(arr);
System.out.println(Arrays.toString(arr));
}
static int sort(int[] arr){
int i=0;
while(i < arr.length){
int correct = arr[i] - 1;
if(arr[i]< arr.length && arr[i] != arr[correct]){
swap(arr , i ,correct);
}
else{
i++;
}
}
for (int index = 0; index <arr.length ; index++) {
if(arr[index] != index){
return index;
}

}
return arr.length;
}
static void swap(int arr[] ,int first, int second){
int temp =arr[first];
arr[second] =arr[first];
arr[second] =temp;
}}

Answer 8

This is my code

Answer 9

Vijay Maurya

Where is swap method in your code and also why you are returning length of arr when you didn't assign to a variable to use that.

Answer 10

Swap method is used from other code

Answer 11

Vijay Maurya

You can use Arrays.sort() to sort an array.

https://code.sololearn.com/cOTg0k8v5b3S/?ref=app