var fn = function(num){
if ( num <= 1){
return num;
}
else{
return arguments.callee(num-1)*num;
}
}
console.log(fn(4));
var fn = function(num){
if ( num <= 1){
return num;
}
else{
return arguments.callee(num-1)*num;
}
}
console.log(fn(4));