Programming Examples

Java program to input an integer and check whether it is a prime number or not.


Write a program to input an integer and check whether it is a prime number or not.

Solution

class PrimeNumber
{
	public static void main(Strign arr[])
	{
		Scanner sc=new Scanner(System.in);
		int i,n,c=0;
		System.out.println("Enter an integer:");
		n=sc.nextInt();
		for(i=1;i<=n;i++)
		{
			if (n%i==0)
			c++;
		}
		if(c==2)
			System.out.println("Prime number");
		else
			System.out.println("Not a Prime number");
	}
}
Output

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