08. 수학 메서드 : Math.random() : 0과 1사이의 난수 값을 반환 : 반환(숫자) : 0,1 포함X

번호 기본값 메서드 리턴값 클릭 
const arrNum = [ 100, 200, 300, 400, 500 ];

//01.
document.querySelector(".sample01_N1").innerHTML = "1";
document.querySelector(".sample01_Q1").innerHTML = "[100, 200, 300, 400, 500]";
document.querySelector(".sample01_M1").innerHTML = "length";
document.querySelector(".sample01_P1").innerHTML = arrNum.length;

//02.
const arrTxt = ['a', 'b', 'c', 'd', 'f'];
document.querySelector(".sample01_N2").innerHTML = "2";
document.querySelector(".sample01_Q2").innerHTML = "['a', 'b', 'c', 'd', 'f']";
document.querySelector(".sample01_M2").innerHTML = "length";
document.querySelector(".sample01_P2").innerHTML = arrTxt.length;

//03.
const arr = [1, 2, ['a', 'b']];
document.querySelector(".sample01_N3").innerHTML = "3";
document.querySelector(".sample01_Q3").innerHTML = "[1, 2, ['a', 'b']]";
document.querySelector(".sample01_M3").innerHTML = "length";
document.querySelector(".sample01_P3").innerHTML = arr.length;