C#: Count a specified number in a given array of integers

Last update on June 23 2025 12:59:31 (UTC/GMT +8 hours)

Count Specific Number in Array

Write a C# program to count a specified number in a given array of integers.

Pictorial Presentation:

>C# Sharp Exercises: Count a specified number in a given array of integers

Sample Solution:

C# Sharp Code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

public class Exercise45 {
    static void Main(string[] args) {
        // Prompt the user to input an integer
        Console.WriteLine("\nInput an integer:");

        // Read the input integer and store it in the variable 'x'
        int x = Convert.ToInt32(Console.ReadLine());

        // Define an array of integers 'nums' with pre-defined values
        int[] nums = {1, 2, 2, 3, 3, 4, 5, 6, 5, 7, 7, 7, 8, 8, 9};

        // Display a message indicating the number being searched for in the array
        Console.WriteLine("Number of " + x + " present in the said array:");

        // Count the occurrences of the input integer 'x' in the 'nums' array and print the count
        Console.WriteLine(nums.Count(n => n == x));
    }
}

Sample Output:

Input an integer:                                                      
5                                                                      
Number of 5 present in the said array:                                 
2

Flowchart:

For more Practice: Solve these Related Problems:

Write a C# program to find the number that appears most frequently in an array.
Write a C# program to count how many even numbers appear in an array.
Write a C# program to find the total number of occurrences of multiple user-specified numbers.
Write a C# program to determine the count of duplicates in an array.

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