C# program to find highest repetitive count in a integer array [1, 1, 2, 5, 6, 7, 3, 3, 3, 5, 2, 4, 1, 1, 1, 1

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Find Highest Repetitive Count in a integer array.
       [1,2,5,4,4,6,7,3,3,5,2,4]

class Program
{
    static void Main(string[] args)
    {              
        int[] array = { 10, 5, 10, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12 };
        int count = 1;
        for (int i = 0; i < array.Length; i++)
        {
            for (int j = i; j < array.Length - 1 ; j++)
            {

               if(array[j] == array[j+1])
                  count = count + 1;
            }
            Console.WriteLine("\t\n " + array[i] + "occurse" + count);
            Console.ReadKey();
        }
    }
}

What I have tried:

class Program
{
    static void Main(string[] args)
    {              
        int[] array = { 10, 5, 10, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12 };
        int count = 1;
        for (int i = 0; i < array.Length; i++)
        {
            for (int j = i; j < array.Length - 1 ; j++)
            {

               if(array[j] == array[j+1])
                  count = count + 1;
            }
            Console.WriteLine("\t\n " + array[i] + "occurse" + count);
            Console.ReadKey();
        }
    }
}

Posted 31-Aug-20 9:50am

Arfat M

Updated 31-Aug-20 21:05pm

v2

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Comments

ZurdoDev 31-Aug-20 16:04pm

And what is your question?

Arfat M 31-Aug-20 23:00pm

Find highest repetitive number and how many times that occured in an current array

ZurdoDev 1-Sep-20 7:04am

That is not a question. That is a statement. Notice, a question should have one of these silly symbols "?".

George Swan 1-Sep-20 4:08am

There's an answer here that uses the same array values as in your example: https://stackoverflow.com/questions/20765589/finding-duplicate-integers-in-an-array-and-display-how-many-times-they-occurred

2 solutions

Solution 2

this:

C#

if(array[j] == array[j+1])
   count = count + 1;

is counting every 2 identical consecutive numbers

C#

int[] array = { 10, 5, 10, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12 };
//                         *  *        *  *                  *   *

Changing to

C#

if(array[i] == array[j])
   count = count + 1;

will count every occurrences of number at position i

This code will count occurrences of number at position i

C#

class Program
{
    static void Main(string[] args)
    {              
        int[] array = { 10, 5, 10, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12 };
        int count = 1;
        for (int i = 0; i < array.Length; i++)
        {
            int count = 1;
            for (int j = i+1; j < array.Length - 1 ; j++)
            {

               if(array[i] == array[j])
                  count = count + 1;
            }
            Console.WriteLine("\t\n " + array[i] + "occurse" + count);
            Console.ReadKey();
        }
    }
}

Now, you have to keep track of highest count and its position.

Posted 31-Aug-20 14:34pm

Patrice T

Updated 1-Sep-20 7:55am

v3

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Maciej Los · Accepted Answer · 2020-08-31T10:30:00

If you want to get longest repetition, take a look at my past answer: Longest repeating subsequence using only LINQ[^]

If you just want to get the highest count of item repeated in array, you can try this:

C#

int[] array = { 10, 5, 10, 2, 2, 3, 4, 5, 5, 6, 7, 8, 9, 11, 12, 12 };

var groupped = array
	.GroupBy(x=> x)
	.OrderByDescending(grp=> grp.Count())
	.FirstOrDefault();
	
Console.WriteLine($"{groupped.Key} is repeated {groupped.Count()} time(s).");

If you want to display the value and the number of times repeated, use this:

C#

var groupped = array
	.GroupBy(x=> x)
	.OrderByDescending(grp=> grp.Count())
	.ToList();
	
foreach(var d in groupped)
	Console.WriteLine($"{d.Key} is repeated {d.Count()} time(s).");