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showlovezz/sampleBlock.js

Last active February 9, 2020 15:32
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鼠年全馬鐵人挑戰 - 1-5
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sampleBlock.js
var x = 1;
{
var x = 2;
console.log(x)
}
console.log(x)
// console 會印出 2 跟 2
let x = 1;
{
let x = 2;
console.log(x)
}
console.log(x)
// console 會印出 2 跟 1
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