C#: Create a new array from a given array of integers shifting all zeros to left direction by swapping with number

Last update on June 28 2025 12:53:57 (UTC/GMT +8 hours)

Shift Zeros to Left in Array

Write a C# Sharp program to create an array from a given array of integers by shifting all zeros to the left direction.

Visual Presentation:

Sample Solution:

C# Sharp Code:

using System; // Importing the System namespace

namespace exercises // Defining a namespace called 'exercises'
{
    class Program // Defining a class named 'Program'
    {
        static void Main(string[] args) // The entry point of the program
        {               
            // Calling the 'test' method with a given integer array 
            // and storing the returned modified array in 'item'
            int[] item = test(new[] { 1, 2, 0, 3, 5, 7, 0, 9, 11 }); 

            // Outputting the elements of the modified array
            Console.Write("New array: "); 
            foreach (var i in item) // Looping through each element in the 'item' array
            {
                Console.Write(i.ToString() + " "); // Outputting each element followed by a space
            }     
        }               

        // Method to move all occurrences of '0' to the end of the array
        static int[] test(int[] numbers)
        {
            int pos = 0; // Variable to track the position of non-zero elements

            // Looping through the array to move all '0's to the end
            for (int i = 0; i < numbers.Length; i++)
            {
                if (numbers[i] == 0)
                {
                    // Swapping '0' with the non-zero element at position 'pos'
                    numbers[i] = numbers[pos]; // Placing non-zero element in place of '0'
                    numbers[pos++] = 0; // Placing '0' at the next position after the non-zero element
                }
            }
            return numbers; // Returning the modified array
        }    
    } 
}

Sample Output:

New array: 0 0 1 3 5 7 2 9 11

Flowchart:

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