# JS syntax - arrays [[JS Syntax]] ### arrays ```js array = [{key:value},{key:value}] ``` adding to a list ```js array.push(key) array.push({key:value}) ``` joining two arrays ```js array1 = [1,2,3] array2 = [4,5,6] array3 = array1.concat(array2) ``` ```js array3 = [1,2,3,4,5,6] ```