javascript函数的递归调用记得加上return

var i = 0;
function fn()...{
    i++;
    if(i < 10)...{
        fn();
    }else...{
        return i;
    }
}

var result = fn();
console.log(result);

		

var i = 0;
function fn()...{
    i++;
    if(i < 10)...{
        return fn();
    }else...{
        return i;
    }
}

var result = fn();
console.log(result);

		

function Fibonacci(n)...{  
    if(n==1)...{  
        return 1;  
    }else if(n==2)...{  
         return 1;  
    }else...{  
        Fibonacci(n-1)+ Fibonacci(n-2);  
    }  
}  

		

function Fibonacci(n){  
    if(n==1){  
        return 1;  
    }else if(n==2){  
         return 1;  
    }else{  
        return Fibonacci(n-1)+ Fibonacci(n-2);  
    }  
}