Use the Length array property : Array Length « Data Structure « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Data Structure
3. Array Length

using System; 
 
class MainClass {  
  public static void Main() {  
    int[] nums = new int[10];  
 
    Console.WriteLine("Length of nums is " + nums.Length);  
  
    Console.Write("use Length to initialize nums");
    for(int i=0; i < nums.Length; i++)  
      nums[i] = i * i;  
  
    Console.Write("now use Length to display nums");
    Console.Write("Here is nums: "); 
    for(int i=0; i < nums.Length; i++)  
      Console.Write(nums[i] + " ");  
  }  
}

Length of nums is 10
use Length to initialize numsnow use Length to display numsHere is nums: 0 1 4 9 16 25 36 49 64 81 "