Given a starting number and the ending number the task is to find the all the Spy Number present in that given range and also to display it’s frequency.
Spy Number is a number whose sum of digits and product of digits are equal.
Example 1: 22. 2+2 = 2*2 = 4. Hence it is a Spy Number.
Example 2: 44. 4+4 ≠ 4*4. Here the sum of digits is not equal to the product of digits. Hence it is not a Spy Number.
Java
import java.util.*;
public class SpyNumberRange
{
public static void main(String args[])
{
int start=0,end=0,r=0,s=0,p=1,n=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("Spy Numbers in the given range: ");
for(int i=start;i<=end;i++)
{
n=i;
while(n>0)
{
r=n%10;
s=s+r;
p=p*r;
n=n/10;
}
if(s==p)
{
System.out.println(i);
frequency++;
}
s=0;p=1;
}
System.out.print("Frequency: "+frequency);
}
}