Java program to find factorial of a number

Program:-

import java.util.Scanner;

class group{
public static void main(String angt[]){
Scanner data = new Scanner(System.in);
double num,i,fat=1;
// Reading a number
System.out.println("Enter a number to find factorial");
num=data.nextDouble();

for(i=1;i<=num;i++)
fat=fat*i;
System.out.println("Factorial of the number is:"+fat);
}
}

 Output:-

Enter a number to find factorial
4
Factorial of the number is:24.0

Output:-

Enter a number to find factorial
0
Factorial of the number is:1.0

Output:-

Enter a number to find factorial
15
Factorial of the number is:1.307674368E12

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