Truthy
Falsy
function logger(){
console.log(“logging…”
}
logger();
logger();
logger();
function buySomeFruits(bananaCount,lemonCount){
const fruits=바나나 ${bananaCount}개와 레몬 ${lemonCount}를 샀다
return fruits;
}
const bananaAndeLemon=buySomeFruits(5,10)
console.log(bananaAndeLemon)
indexOf
lastIndexOf
Includes
const array3=[…array1,…array2]
console.log(profile.firstName)
console.log(profile[“firstName”])
const object3={…object1,…object2}
console.log(Object.keys(object3))