var foo=’foo’;
var bar=’bar’;
function myFunc() {
return foo+bar;
}
//相当于
var foo
var bar
function myFunc(){
return foo+bar
}
foo = 'foo'
bar = 'bar'
//根据题意执行
console.log(myFunc())//打印foobar
var foo=’foo’;
var bar=’bar’;
function myFunc() {
return foo+bar;
}
myFunc();
//相当于
var foo;
var bar;
function myFunc() {
return foo+bar;
}
foo = 'foo';
bar = 'bar';
myFunc();