How to slove this problem?

Question

package first;
import java.util.Scanner;

public class fac
{
static double fact(double a)
{
double fact=1, i;
if(a==0)
{
return fact;
}
else
{
for(i=1;i<=a;i++)
{
fact=fact*i;
}
return fact;
}
}

public static void main(String[] args)
{
double a,fact;
Scanner input = new Scanner(System.in);
System.out.println("Enter a number to find its factorial : ");
a = input.nextInt();
fact=fact(a);
System.out.println(a+" ! = "+fact);
}
input.close();
}

Answer 1

There are few small mistake such as in main method input.close(); should be inside method and then a is declared double datatype but while taking input you used nextInt() which might raise error.

Change your main method with this.

public static void main(String[] args)
{
double a, fact;
Scanner input = new Scanner(System.in);
System.out.println("Enter a number to find its factorial : ");
a = input.nextDouble();
fact = fact(a);
System.out.println(a+" ! = "+fact);
input.close();
}

Answer 2

Thank You Satyam Mishra.
Fix that problem.😊

Answer 3

👍👍👍 User42