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Factorial Number Using While
Program
class Main
{
public static void main(String args[])
{
int x=1,n=5,fact=1;
while(x<=n)
{
fact=fact*x;
x++;
}
System.out.print(fact);
}
}
Using CommandLine Arguments
class Main
{
public static void main(String args[])
{
int x=1,n,fact=1;
n=Integer.parseInt(args[0]);
while(x<=n)
{
fact=fact*x;
x++;
}
System.out.print(fact);
}
}
Using Scanner
import java.util.*;
class Main
{
public static void main(String args[])
{
int x=1,n,fact=1;
Scanner s=new Scanner(System.in);
System.out.println("Enter n value");
n=s.nextInt();
while(x<=n)
{
fact=fact*x;
x++;
}
System.out.print(fact);
}
}
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