const r = 1 < 2
if(a) {
console.log('참')
} else {
console.log('거짓')
}
//간결한 코드
console.log(a ? '참' : '거짓')
//조건문(IF statement)
import random from "./getRandom"
const u = random()
if(u === 0) {
console.log('u is 0')
### #화살표 함수 : 함수 최소화
```js
const double = function (x) {
return x * 2
}
console.log('double:', double(7))
const doubleArrow = (x) => {
return x * 2
}
console.log('doubleArrow', doubleArrow(7))
//조건문(SWITCH statement)
switch (a) {
case 0:
console.log('u is 0')
break
case 2:
console.log('u is 2')
break
case 4:
console.log('u is 4')
break
default:
console.log('rest...')
}
# 반복문
```js
for (let i = 0; i < 3; i += 1) {
console.log(i)
}
✔️Truthy(참 같은 값)
✔️Falsy(거짓 같은 값)
const q = 7
double()
function double() {
console.log(q * 2)
}
✏️ https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/String
✏️ https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Math
✏️ https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Array
✏️ https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Object
✏️ https://developer.mozilla.org/ko/docs/Web/API/Window/localStorage
Query String
주소?속성=값&속성=값&속성=값