How to find missing number from arraylist, numbers added randomly?

Question

Any sample code in C or Java would be helpful?

Answer 1

This is simple, just search through your array list for that specific number which you want to make sure that
number is missing or present the array list.
Have a look to the sample code below:

#include <stdio.h>

int main()
{
    int arr[10];
    int i, no, missing = 1;

    printf("Enter 10 random number one by one:\n");
    for (i = 0; i < 10; i++)
        scanf("%d", &arr[i]);

    printf("Enter number which you want to find : ");
    scanf("%d", &no);

    for(i = 0; i < 10; i++) {
        if (no == arr[i])
            missing = 0;
    }

    if (missing)
        printf("%d is missing in the given array list.\n", no);
    else
        printf("%d is present in the given array list.\n", no);

    return 0;
}