const day = [];
const daysOfWeek = ["mon" , "tue" , "wed" , "thu" , "fri" , "sat"];
const arrayVariable = [ ] ;
const arrayVariable = [ ” value_1 ” , “ value_2 ” ] ;
,
(콤마) 로 구분daysOfWeek
daysOfWeek[0]
array
array [ index ]
0
부터 시작daysOfWeek.push("sun");
array . push ( ” value ” ) ;
daysOfWeek[0] = "no";
array [ index ] = “ value “ ;
const array = [1,2,3];
const find_1 = array.indexOf(1);
console.log(find_1);
// 0
const variable = array . indexOf ( index ) ;