How to Find Minimum Value in Array in C#

To find the minimum value in an array in C#, use the Min() method from System.Linq. For example, int minValue = array.Min(); returns the smallest number in the array.

Syntax

The syntax to find the minimum value in an array uses the Min() method from the System.Linq namespace.

• array.Min(): Returns the smallest element in the array.

Make sure to include using System.Linq; at the top of your code file.

csharp

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] numbers = { 5, 3, 9, 1, 6 };
        int minValue = numbers.Min();
        Console.WriteLine(minValue);
    }
}

Output

1

Example

This example shows how to find the minimum value in an integer array using Min(). It prints the smallest number to the console.

csharp

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] numbers = { 10, 20, 5, 15, 30 };
        int minValue = numbers.Min();
        Console.WriteLine($"The minimum value is: {minValue}");
    }
}

Output

The minimum value is: 5

Common Pitfalls

Common mistakes when finding the minimum in an array include:

• Not including using System.Linq;, which causes Min() to be undefined.
• Calling Min() on an empty array, which throws an exception.
• Trying to find the minimum in a null array, which causes a NullReferenceException.

Always check that the array is not empty or null before calling Min().

csharp

using System;
using System.Linq;

class Program
{
    static void Main()
    {
        int[] emptyArray = { };

        // Wrong: This will throw an InvalidOperationException
        // int minValue = emptyArray.Min();

        // Right: Check if array has elements
        if (emptyArray != null && emptyArray.Length > 0)
        {
            int minValue = emptyArray.Min();
            Console.WriteLine(minValue);
        }
        else
        {
            Console.WriteLine("Array is empty or null.");
        }
    }
}

Output

Array is empty or null.

Quick Reference

Summary tips for finding minimum in array:

• Use array.Min() from System.Linq.
• Always include using System.Linq;.
• Check array is not empty or null before calling Min().
• Works with arrays of numbers and other comparable types.

Key Takeaways

Use Min() from System.Linq to find the smallest value in an array.

Always include using System.Linq; to access Min().

Check that the array is not empty or null before calling Min() to avoid errors.

Min() works on arrays of numbers and other types that can be compared.