How to set give multiple values to a javascript variable

Question

I'm making a program that requires different parts in a variable the code goes like this

    var num=Math.round(Math.random()*5);
var a;
var a[0]="hi"
/*I've done this before, but remember it as a[num] */
var a[1]...
/*Many vars later*/
console.log(a[num])

this code always says that a[] does not work

@thangngoc89 I'm usinc Codecademy(a website that runs coding) and it says "Uncaught SyntaxError: Unexpected token [" — Bruce Wayne
– Bruce Wayne, Commented Mar 30, 2016 at 21:36

Wainage · Accepted Answer · 2016-03-30 21:36:09Z

2

You need to tell the compiler it's an array

var a = [];
a[0] = 'hi';
console.log(a[0]); // => hi

answered Mar 30, 2016 at 21:36

Wainage

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1 Comment

Bruce Wayne Over a year ago

i just realized it did. something doesnt work on my full code

Nina Scholz · Accepted Answer · 2016-03-30 21:43:54Z

1

Set this

var a;

to

var a = [];

for a declaration of an Array.

Please change this

var num=Math.round(Math.random()*5);

to

var num = Math.floor(Math.random() * 5); // for numbers from 0 to 4

because Math.round rounds depending up or down. Math.floor gets the integer part of a number.

var num = Math.floor(Math.random() * 5); // for numbers from 0 to 4
var a = [];
a[0] = "ha";
a[1] = "he";
a[2] = "hi";
a[3] = "ho";
a[4] = "hu";
document.write('<pre>' + JSON.stringify(a, 0, 4) + '</pre>');
document.write(a[num]);

edited Mar 30, 2016 at 21:43

answered Mar 30, 2016 at 21:36

Nina Scholz

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