Answer Posted / deeksha shaw

import java.util.Scanner;
public class peterson
{
public static void main(String args[])
{
int n,f=1;
Scanner in=new Scanner(System.in);
System.out.println("enter a number");
n=in.nextInt();
for(int a=1;a<=n;a++)
f=f*a;
if (f==n)
System.out.println(" it is a Peterson number");
else
System.out.println("it is not a Peterson number");
}
}

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