Q:

Find positive numbers from array of integers using C# program

belongs to collection: C# Basic Programs | array programs

mahmoud2506
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2022-05-09
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Given array of integers, and we have to all positive numbers.

To find out positive numbers from array: we check each number, if number is greater than or equal to zero then it will be a positive number. We traverse array of integer, if it is positive number then we will print that number of console.

For example we have list of integers:

18, -13, 23, -12, 27

18 is a positive number because it is greater than equal to zero.
-13 is not a positive number because it is not greater than equal to zero.
23 is a positive number because it is greater than equal to zero.
-12 is not a positive number because it is not greater than equal to zero.
27 is a positive number because it is greater than equal to zero.

 

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mahmoud2506
2022-05-09
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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 positive 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 positive numbers :
12 14

 

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