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Steilla Mitchel

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I completed my post-graduation in 2013 in the engineering field. Engineering is the application of science and math to solve problems. Engineers figure out how things work and find practical uses for scientific discoveries. Scientists and inventors often get the credit for innovations that advance the human condition, but it is engineers who are instrumental in making those innovations available to the world. I love pet animals such as dogs, cats, etc.

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Ravi Vishwakarma

Ravi Vishwakarma

12-Jun-2024

Let's write code to check whether the array contains duplicate values.

// Method to determine if the array contains any duplicates
public static bool ContainsDuplicate(int[] nums)
{
    // Create a list to keep track of the elements we have seen
    IList<int> list = new List<int>();

    // Iterate through each element in the array
    foreach (var item in nums)
    {
        // Check if the current element already exists in the list
        if (list.Contains(item))
        {
            // If it does, return true indicating a duplicate is found
            return true;
        }
        else
        {
            // If it doesn't, add the element to the list
            list.Add(item);
        }
    }

    // If no duplicates are found after checking all elements, return false
    return false;
}

Now call this function from the main function.

    public class Program
    {
        public static void Main()
        {
            IList<int[]> list = new List<int[]>
            {
                new int[] { 1, 2, 3, 1 },
                new int[] { 1, 2, 3, 4 },
                new int[] { 1, 1, 1, 3, 3, 4, 3, 2, 4, 2 }
            };

            foreach (var item in list)
            {
                Console.WriteLine(item + " " + Program.ContainsDuplicate(item));
            }

            Console.ReadLine();
        }
    }

Output :

System.Int32[] True
System.Int32[] False
System.Int32[] True

 

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