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求任意数的和：（在控制台上测可以执行）
求任意数的和：（在控制台上测可以执行）
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var fn=(...rest) => { var sum =0; for(var i of rest){ sum += i; } return sum;
} fn(1,2,3,4,5,6,7,8,9,10)
- 1
var fn=(...rest) => { var sum =0; for(var i of rest){ sum += i; } return sum;
} fn(1,2,3,4,5,6,7,8,9,10)
QAQ-FAN
var fn=(...rest) => { var sum =0; rest.forEach( (element, index, array) =>{ sum += element; } ) return sum;
} fn(1,2,3,4,5,6,7,8,9,10)