How to declare Array in JavaScript

// Array creation method in JavaScript

//1) JavaScript array literal

var arr=[12,23,32,45,34,78,87,54,10];

for(i=0;i<arr.length;i++)
{
console.log(i+" ");
}

//2) JavaScript Array directly (new keyword)

var emp=new Array();
emp[0]="Kumar";
emp[1]="John";
emp[2]="Ramesh";
for(i=0;i<emp.length;i++)
{
console.log(emp[i]+" ");
}

//3) JavaScript array constructor (new keyword)

var student=new Array("Brijesh","Ramesh","John","Rakesh");
for(i=0;i<student.length;i++)
{
console.log(student[i]+" ");
}