Simple program #6 (Check whether a number is prime or not)
Smallest prime number is 2
Not prime number
The program is written in C# programming language and will accept a number as input. The logic of the program is to check whether the number is prime or not.
Note: If you are new to C# and Console Application. Try to code First C# Program
Let’s find out a simple and easy way to code the program.
class Simple6 //checking number prime or not
static void Main(string args)
Console.Write("Enter a number: ");
int n = Convert.ToInt32(Console.ReadLine());
int i = 0;
if (n < 2)
Console.WriteLine("Smallest prime number is 2");
for (i = 2; i < n; i++)
if (n % i == 0)
Console.WriteLine("Not Prime number");
if (n == i)
The input number here is 3. The program will check with the number is prime or not. The output is shown below:
For any query, comment us below.
Skip to Main Table Simple program
Previous - Simple program #5
Next – Simple program #7
Click imagination hunt to read latest blogs.
Keep learning and sharing...