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JavaScript 函数全局变量定义

// Declare your variable here
var myGlobal=10;


function fun1() {
// Assign 5 to oopsGlobal Here
oopsGlobal=5;
}


// Only change code above this line
function fun2() {
var output = "";
if (typeof myGlobal != "undefined") {
output += "myGlobal: " + myGlobal;
}
if (typeof oopsGlobal != "undefined") {
output += " oopsGlobal: " + oopsGlobal;
}
console.log(output);
JavaScript 带参数函数定义
JavaScript 函数局部变量定义
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HTML5&CSS

JavaScript

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