Given a starting number and the ending number the task is to find the all the Prime Number present in that given range and also to display it’s frequency.
Prime Number is a number which is only divisible by 1 and the number itself i.e., it has no factors other than 1 and itself.
Example 1: 7 is only divisible by 1 and itself only. Hence it is a Prime Number.
Example 2: 4 is divisible by 1 and 2 and 4. Hence it is not a Prime Number.
Java
import java.util.*;
public class PrimeNumberRange
{
public static void main(String args[])
{
int start=0,end=0,flag=0,frequency=0;
Scanner sc=new Scanner(System.in);
System.out.print("Enter a starting range: ");
start=sc.nextInt();
System.out.print("Enter a ending range: ");
end=sc.nextInt();
System.out.println("Prime Numbers in the given range are:-");
for(int i=start;i<=end;i++)
{
for(int j=1;j<=i;j++)
{
if(i%j==0)
{
flag++;
}
}
if(flag==2)
{
System.out.println(i);
frequency++;
}
flag=0;
}
System.out.println("Frequency: "+frequency);
}
}