[Java script] 이중배열

array_1.html

0.00MB

<script>

     arr2 = [1,2,3,4,5,6,[1,2,3]]; 

    console.log(arr2); //[1,2,3,4,5,6,Array(3)]

    console.log(arr2[4]); //5

    console.log(arr2[6]); //[1,2,3]

    //3*4 3층짜리 아파트 4호실까지 있는

    arr3=[[,,,,],[,,,,],[,,,,]];

    console.log(arr3); //[Array(4), Array(4), Array(4)]

    arr3 = [[101,102,103,104],[201,202,203,204],[301,302,303,304]]

 

    console.log(arr3);

    console.log(arr3[0]); //[101,102,103,104]

    console.log(arr3[0][3]); //104 <--이중배열

 

    console.log(arr3[1]); //[201,202,203,204]

    

    arr3[1].pop();

    console.log(arr3[1]);

    arr3[1].push(204);

    console.log(arr3[1]);

 

    

 

  

 

</script>