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交作业

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Ethan-Fanny

#1 Created at ... [Delete] [Delete and Lock User]

第一题:

function sum(...rest) { var sum=0; for(var x of arguments){ sum+=x; } return sum; }

第二题:

if(pi == null){
   pi = 3.14;

} return pi*r*r;

第三题:

if (a > b) {
    return a;
} else {
    return b;
}

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