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C# Program to Find the Length of an Array

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In this tutorial, we will write a C# program to find the length of an array entered by the user, we have used while loop and try–catch block for the exception

Question:
Write a C# program to find the length of an Array.

Solution:
Here first we take the arrays from the user and to exit from an array user need to enter –999 at last. -999 is an exit value that is defined at the beginning of the program.

To take the user input, while loop is used inside which try-and catch blocks are executed. lastly array.Length is used to get how many elements the user entered.

C# Program to find the length of an Array.

It can also be done without the use of try-catch block

Source Code

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

class Program
{
  static void Main(string[] arg)
  {
    //CONSTANT VALUE TO EXIT
    const int EXIT_VALUE = -999;
    List<int> numbers = new List<int> ();

    Console.WriteLine("Enter the number and press -999 at the end:");

    while (true)
    {
      try
      {
        var input = Console.ReadLine();
        int i = int.Parse(input);
        if (i == EXIT_VALUE) break;
        numbers.Add(i);
      }

      catch (System.Exception ex)
      {
        Console.WriteLine("Invalid Input!!");
      }
    }

    int[] array = numbers.ToArray();
    Console.WriteLine("Length of an Array is:{0}", array.Length);
  }
}

Output:

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