for(var key in arr)
{
console.log(`Hello, ${arr[key]}!`)
}
console.log('-------------------------------------');
var i;
for(i=arr.length-1;i>=0;i--)
console.log(`Hello, ${arr[i]}!`);
i = arr.length-1;
while(i>=0)
i = i-1;
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虎虎leaf123
for(var key in arr)
{
console.log(`Hello, ${arr[key]}!`)
}
console.log('-------------------------------------');
var i;
for(i=arr.length-1;i>=0;i--)
{
console.log(`Hello, ${arr[i]}!`);
}
console.log('-------------------------------------');
i = arr.length-1;
while(i>=0)
{
console.log(`Hello, ${arr[i]}!`);
i = i-1;
}