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Find negative numbers from array of integers using C# program

In this C# program, we will learn how to find out negative numbers from list of integers? Here we will create an array that contains list of integers.

Given array of integers, and we have to all negative numbers.

To find out negative numbers from array: we check each number; if number is less than zero then it will be a negative number. We traverse array of integer, if it is negative number then we will print that number of console.

For example we have list of integers:

18, -13, 23, -12, 27

18 is not a negative number because it is not less than zero.
-13 is a negative number because it is less than zero.
23 is not a negative number because it is not less than zero.
-12 is a negative number because it is less than zero.
27 is not a negative number because it is not less than zero.

Consider the example:

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main()
        {
            int i       = 0;
            int[] arr   = new int[5];

            Console.WriteLine("Enter array elements : ");
            for (i = 0; i < arr.Length; i++)
            {
                Console.Write("Element[" + (i + 1) + "]: ");
                arr[i] = int.Parse(Console.ReadLine());
            }

            Console.WriteLine("List of negative numbers : ");
            for (i = 0; i < arr.Length; i++)
            {
                if (arr[i] < 0)
                    Console.Write(arr[i] + " ");
            }
            Console.WriteLine();
        }
    }
}

Output

Enter array elements :
Element[1]: 12
Element[2]: -13
Element[3]: 14
Element[4]: -15
Element[5]: -17
List of negative numbers :
-13  -15  -17




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