JAVASCRIPT

create array with number js

var foo = new Array(45); // create an empty array with length 45

create array of numbers javascript

for(var i,a=[i=0];i<10;a[i++]=i);

building an array of a numbers javascript

const arr = [...Array(2)] // output [undefined, undefined]

create array with number js

var foo = new Array(45); // create an empty array with length 45

create array of numbers javascript

for(var i,a=[i=0];i<10;a[i++]=i);

building an array of a numbers javascript

const arr = [...Array(2)] // output [undefined, undefined]