arrays

JavaScript - Arrays

Arrays in JavaScript will store heterogeneous values.

• Create an array:

  const nameOfArray = [item1, item2, ...]; 

• Accessing the elements:

  const avengers = ["Ironman", "Thor", "Thanos", 3000];
  let avenger = avengers[0]; 

• Add element to the array:

  avengers.push("Captain"); //add at the end
  avengers[0] = "Captain"; //index based adding

• Properties and Methods:

  avengers.length   // returns the number of avengers
  avengers.sort()   // sorts the avengers
  avengers.indexOf("ironman") // return index value of ironman
  avengers.pop() // delete last indexed value of avengers

• NOTE: adding elements with high indexes can create undefined values in an array.