Explain the use of the foreach () method in JavaScript-basics

The ForEach () method of a JavaScript array invokes each element in the array.
Grammar

Array.foreach (callback[, Thisobject]);

The following are the details of the parameters:

• Callback: Function tests each element of an array.
• Thisobject: Object is used as the execution callback.

return value:

Returns the creation of an array.
Compatibility:

This approach is a JavaScript extension to the ECMA-262 standard, so it may not exist in other implementations of the standard. To make it work, you need to add the top of the following scripting code:

if (! Array.prototype.forEach)
{
 Array.prototype.forEach = function (Fun/*, thisp*/)
 {
  var len = This.length;
  if (typeof fun!= "function")
   throw new TypeError ();

  var thisp = arguments[1];
  for (var i = 0; i < len; i++)
  {
   if (i)
    fun.call (Thisp, this[i], I, this);
}

Example:

This will produce the following results:

[0] is a
[1] is 5
[2] are 8
[3] is 130
[4] is 44