Given a starting number and the ending number the task is to find the all the Pronic Number present in that given range and also to display it’s frequency.
Pronic Number is a number which is product of two consecutive numbers.
Example 1: 20. 4 x 5 = 20. We observe 4 and 5 are consecutive whose product is 20. hence it is a Pronic Number.
Example 2: 9 is not an product of two consecutive numbers. Hence it is not an Pronic Number.
Java
import java.util.*;
public class PronicNumberRange
{
public static void main(String args[])
{
int start=0,end=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("Pronic Numbers in the given range are:-");
for(int i=start;i<=end;i++)
{
for(int j=1;j<=i;j++)
{
if(j*(j+1)==i)
{
System.out.println(i);
frequency++;
break;
}
}
}
System.out.println("Frequency: "+frequency);
}
}