factorial of numbers

2)calculate factorial of numbers
object demo
{
def main(args:Array[String])
{
println("enter no. you want to be search:")
var n=scala.io.StdIn.readInt();
var fact:Int=1;
for(i<-1 to n)
{
fact=fact*i;
}
println("factorial of " +n+ " is : "+fact);
}
}