Question

Find all the non-Prime numbers between a given range.

				
					Enter the lower range
1
Enter the Upper range
50
Non Prime Numbers:
4  6  8  9  10  12  14  15  16  18  20  21  22  24  25  26  27  28  30  32  33  34  35  36  38  39  40  42  44  45  46  48  49  50

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Code

Java

Python

Java

				
					import java.util.*;
public class nonPrimeNumberInRange
{
    public static void main(String args[])
    {
        int upperRange=0,lowerRange=0,i=0,j=0,flag=0;
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter the lower range");
        lowerRange=sc.nextInt();
        System.out.println("Enter the Upper range");
        upperRange=sc.nextInt();
        System.out.println("Non Prime Numbers:");
        for(i=lowerRange;i< upperRange;i++)
        {
           
            if(i<=1)
            {
                System.out.print(i+"  ");
            }
            else
            {
                flag=0;
                
                for(j=2;j< i;j++)
                {
                    /*Checking if i is divisible by j.*/
                    if(i%j==0)
                    {

                        flag=1;
                        break;
                    }
                }
                if(flag==1)
                {
                    System.out.print(i+"  ");
                }
            }
          
            
        }

    }
}

Python

				
					lowerRange=int(input("Enter lower value:"))
upperRange=int(input("Enter upper value:"))
print("non Prime numbers between",lowerRange,"and",upperRange,":")
for i in range(lowerRange,upperRange):
    if(i<=1):
        print(i, end=" ")
    else:
        isPrimeNumber = True
        for j in range(2,i):
            # 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(i%j==0):
                isPrimeNumber=False
                break
        if(isPrimeNumber==False):
            print(i,end=" ")