JavaScript concat () method-concatenate two or more arrays

One, definition and usage

The Concat () method is used to concatenate two or more arrays.

The method does not alter the existing array, but only returns a copy of the concatenated array.

Grammar

Arrayobject.concat (Arrayx,arrayx,......, Arrayx)

Parameters	Description
Arrayx	Necessary. The parameter can be a specific value, or it can be an array object. can be any number.

return value

Returns a new array. The array is generated by adding all the Arrayx parameters to the Arrayobject. If the argument for the concat () operation is an array, then the element in the array is added, not the array.

Two, examples

Use Concat () to connect values in an array

"text/javascript">var a = [1 ,2,3];d ocument.write (A.concat (4,5)); </script></body>
Output: 1,2,3,4,5
Connect two arrays using concat ()
"Text/javascript">vararr =NewArray (3) arr[0] ="George"arr[1] ="John"arr[2] ="Thomas"varARR2 =NewArray (3) arr2[0] ="James"arr2[1] ="Adrew"arr2[2] ="Martin"document.write (Arr.concat (arr2))</script></body>
Output: George,john,thomas,james,adrew,martin
Connect three arrays using concat ()
"Text/javascript">vararr =NewArray (3) arr[0] ="George"arr[1] ="John"arr[2] ="Thomas"varARR2 =NewArray (3) arr2[0] ="James"arr2[1] ="Adrew"arr2[2] ="Martin"varARR3 =NewArray (2) arr3[0] ="William"arr3[1] ="Franklin"document.write (Arr.concat (ARR2,ARR3))</script></body>
Output: George,john,thomas,james,adrew,martin,william,franklin
JavaScript concat () method-concatenate two or more arrays