console.log('for-正序:');
for(var i in arr){
console.log('Hello,' + arr[i] + '!');
}
console.log('for-倒叙:');
arr.reverse();
console.log('while-正序:');
var i = 0;
while(i < arr.length){
console.log('Hello,' + arr[i] +'!');
i ++;
console.log('while-反序:');
while(i<arr.length){
i++;
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Mr . Moustache 丶💪
console.log('for-正序:');
for(var i in arr){
console.log('Hello,' + arr[i] + '!');
}
console.log('for-倒叙:');
for(var i in arr){
arr.reverse();
console.log('Hello,' + arr[i] + '!');
}
console.log('while-正序:');
var i = 0;
while(i < arr.length){
console.log('Hello,' + arr[i] +'!');
i ++;
}
console.log('while-反序:');
var i = 0;
while(i<arr.length){
arr.reverse();
console.log('Hello,' + arr[i] + '!');
i++;
}