query for c# program

Question

program in C# to find number enterd by user is prime or not using function.

Bhagwan Aswal · Answer

thank you i m thankful to you.

Vikram Agrawal · Answer

Hey Bhagwan, Try this one also private static bool IsPrime(int num) { if(num return false; if(num%2==0) return false; for(int i=2;i { if(num%i==0) return false; } return true; } call this method where ever you want like: static void Main() { int num; Console.Write("Enter a Number : "); num=Convert.ToInt32(Console.ReadLine()); if(IsPrime(num)) { Console.WriteLine(num + " is a Prime Number."); } else { Console.WriteLine(num + " is not a Prime Number."); } }

Vulpes · Answer

Try this: using System; class Program { static void Main() { int n ; while(true) { Console.Write("Enter a positive integer or 0 to finish : "); int.TryParse(Console.ReadLine(), out n); if (n == 0) return; if(IsPrime(n)) { Console.WriteLine("{0} is prime", n); } else { Console.WriteLine("{0} is not prime", n); } Console.WriteLine(); } } static bool IsPrime(int x) { if (x for (int i = 2; i { if ((x % i) == 0) { return false; } } return true; } }

Manish Kumar Choudhary · Answer

Hi Bhagwan Aswal , Do it by using following lines of code. Function private static int CheckPrime( int number) { int i; for (i = 2; i { if (number % i == 0) { return 0; } } if (i == number) { return 1; } return 0; } Call : Console .WriteLine( "Enter a number" ); int number = Convert .ToInt32( Console .ReadLine()); int result = CheckPrime(number); if (result == 0) { Console .WriteLine( "{0} is not a prime number" , number); } else { Console .WriteLine( "{0} is a prime number" , number); } Console .Read();

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