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function f1(){ console.log('函数体-->重复的代码') } f1()
var f2 = function(){ console.log('匿名函数') } f2()
(function(){ console.log('函数的自调用') })();
function f2(fn){ fn() } function f3(){ console.log('f3') } f2(f3)
function sum(num1, num2){ var sum = num1 + num2 console.log(sum) return sum } var result = sum(10, 20)
function fn(){ console.log(arguments.length) for(var i=0;i<arguments.length; i++){ console.log(arguments[i]) } } fn(1,2,3,4,5)
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