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๋ชฉ๋ก์๋ฐ์คํฌ๋ฆฝํธ (1)
lgvv98
[Node.js] #2 ์์๋ฌ์ผ ํ ์๋ฐ์คํฌ๋ฆฝํธ
#2 ์์๋ฌ์ผ ํ ์๋ฐ์คํฌ๋ฆฝํธ ES2015(ES6) ์ดํ๋ฅผ ๊ธฐ์ค์ผ๋ก ํฉ๋๋ค. ๋ณ์๋ฅผ ์ ์ธํ๋ ๋ฐฉ๋ฒ if (true) { var x = 3; } console.log(x); // 3 if (true) { const y = 3; } console.log(y); // Uncaught ReferenceError: y is not defined var๋ ํจ์ ์ค์ฝํ๋ฅผ ๊ฐ์ ธ์ if๋ฌธ์ ๋ธ๋ก๊ณผ ๊ด๊ณ์์ด ์ ๊ทผ ๊ฐ๋ฅ. const์ let์ ๋ธ๋ก ์ค์ฝํ๋ฅผ ๊ฐ์ ธ์ ๋ธ๋ก ๋ฐ์์๋ ๋ณ์์ ์ ๊ทผ ๋ถ๊ฐ. const a = 0; a = 1; // Uncaught TypeError: Assignment to constant variable. let b = 0; b = 1; // 1 const c; // Uncaught SyntaxEr..
๐ฐ๏ธ Node.js
2023. 7. 17. 19:47