递归举例-斐波那契数列

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斐波那契数列

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 <script>
        function Fei(num){
            if(num === 1 || num === 2){
                return 1;
            }
            return Fei(num - 1) + Fei(num - 2);
        }
        var result = Fei(12);
        console.log(result);
    </script>