Join method in javascript

let arr = [1,2,3,4,5]let joiner = arr.join("-")console.log(joiner)

1-2-3-4-5

const emptyArray = []const numberArray = [1,2,3,4,5];const stringArray = ["A","B","C","D"];const objectArray = [  {    name:"Shubham",    age:21  },  {    name:"Shivam",    age:25  },  {    name:"Abhishek",    age:22  }]console.log(emptyArray.join())console.log(numberArray.join())console.log(stringArray.join())console.log(objectArray.join())

1,2,3,4,5A,B,C,D[object Object],[object Object],[object Object]

const numberArray1 = [1,2,3,4,5];const numberArray2 = [6,7,8,9,10];const stringArray1 = ["A","B","C","D"];const stringArray2 = ["E","F","G","H"];const mixedArray = [1,2,3,4,5,"E","F","G","H"]const exceptionArray = [null,undefined,true,false]console.log(numberArray1.join("+"))console.log(numberArray2.join("*"))console.log(stringArray1.join("["))console.log(stringArray2.join("z"))console.log(mixedArray.join("mixed"))console.log(exceptionArray.join("-"))

1+2+3+4+56*7*8*9*10A[B[C[DEzFzGzH1mixed2mixed3mixed4mixed5mixedEmixedFmixedGmixedH--true-false

const normalParameter = (arr) => {  console.log(arr.join("*"))}const restParameter = (...args) => {  console.log(args.join("-"))}normalParameter([1,2,3,4,5])restParameter(1,2,3,4,5)

1*2*3*4*51-2-3-4-5

const arr = [1,2,3,4,5]// join with reverselet reverseMethod = arr.reverse().join("")console.log(reverseMethod)// join with split method to reverse the arraylet splitMethod = arr.join("").split("")console.log(splitMethod)

54321[ '5', '4', '3', '2', '1' ]