a= '<div id="divId">' // 태그 안에 들어가야할 " 입력
b= "It's 3 o'clodk" // '로 사용했다면 중간에 끊어짐
backtick `
ES6부터 사용될 수 있으며 편리한 경우가 많음
const name = 'DW'
const result = `My name is ${name}` //내부에 변수 사용 가능, 기존엔 ''+name+'' 으로 복잡스럽게 했어야함
const result2 = `2+3=${2+3}` //수식 사용 가능
const result3 = `abcde
fghi` //여러줄 사용 가능, 기존엔 'abcde\nfghi'
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