C# program: Count the number of 1's in the input number

int[] num = new int[] {1, 25, 1, 55, 1};

foreach(int j in num) {
   if (j == 1) {
      cal++;
   }
}

using System;
public class Demo {
   public static void Main() {
      int cal = 0;
      int[] num = new int[] {1, 25, 1, 55, 1};
      Console.WriteLine("Numbers:");
      for (int i = 0; i < 5; i++) {
         Console.WriteLine(num[i]);
      }
      foreach (int j in num) {
         if (j == 1) {
            cal++;
         }
      }
      Console.WriteLine("Number of 1&#39;s: ");
      Console.WriteLine(cal);
      Console.ReadLine();
   }
}

Numbers:
1
25
1
55
1
Number of 1's:  
3