Question

Checking Whether the number Given is a prime number or not.

Prime number is a number that is greater than 1 and divided by 1 or itself only. In other words, prime numbers can't be divided by other numbers than itself or 1. For example 2, 3, 5, 7, 11, 13, 17.... are the prime numbers.

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Code

Java

Python

Java

import java.util.Scanner;
public class PrimeExample
{
 public static void main(String args[])
 {
  int i,flag=0,num=0;
  System.out.println("Enter an Integer number:");

    /*The input provided by user is stored in num*/
    Scanner input = new Scanner(System.in);
    num = input.nextInt();
  /*negative number and 1 are not prime number*/
  if(num< 2)
  {
   System.out.println(num+" is not prime number");
  }
  else
   {
        for(i=2;i< num;i++)
        {
            /*Checking if number is divisible by i.*/
            if(num%i==0)
            {
                System.out.println(num+" is not prime number");
                flag=1;
                break;
            }
        }
        if(flag==0)
        {
            System.out.println(num+" is prime number");
        }
    }
}
}

Python

number=int(input("Enter a number:"))
isPrimeNumber=True
# Checking if the given number is less than 2
# if it is then it is not a prime number
if(number<2):
    print(number,"is not a prime number")
else:
    for i in range(2,number):
        # Checking if the given number is divisible
        # by any other number expect 1 and itself
        # If it is then it's not a prime number
        if(number%i==0):
            isPrimeNumber=False
            break
    if(isPrimeNumber==True):
        print(number,"is a prime number")
    else:
        print(number,"is not a prime number")