Write a program in C# to check whether the entered number is prime or not.
Following is the simple C# code :
Following is the simple C# code :
class Lab { static void Main(string[] args) { int number; Console.Write("Enter a Number : "); number = Convert.ToInt32(Console.ReadLine()); int counter = 0; for (int i = 1; i <= number; i++) { if (number % i == 0) { counter++; } } if (counter == 2) { Console.WriteLine("Entered Number is a Prime Number"); } else { Console.WriteLine("Not a Prime Number"); } Console.ReadLine(); } }
Output:-
Enter a Number : 12 Not a Prime Number Enter a Number : 13 Entered Number is a Prime Number
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