JavaScript Array join() Method Last Updated : 12 Jul, 2024 Comments Improve Suggest changes Like Article Like Report The JavaScript Array join() Method is used to join the elements of an array into a string. The elements of the string will be separated by a specified separator and its default value is a comma(,).Syntaxarray.join(separator);ParametersThis method accepts a single parameter as mentioned above and described below:separator: It is Optional i.e., it can be either used as a parameter or not. Its default value is a comma(, ).Example 1: In this example, the function join() joins together the elements of the array into a string using ‘|’. JavaScript function func() { let a = [1, 2, 3, 4, 5, 6]; console.log(a.join('|')); } func(); Output1|2|3|4|5|6 Example 2: In this example, the function join() joins together the elements of the array into a string using ‘, ‘ since it is the default value. JavaScript let a = [1, 2, 3, 4, 5, 6]; console.log(a.join()); Output1,2,3,4,5,6 Example 3: In this example, the function join() joins together the elements of the array into a string using ‘ ‘ (empty string). JavaScript let a = [1, 2, 3, 4, 5, 6]; console.log(a.join('')); Output123456 We have a complete list of JavaScript Array methods, to check those please go through this Javascript Array Complete reference article.Supported Browsers:Google ChromeEdge Firefox OperaSafari Comment More infoAdvertise with us K Kanchan_Ray Follow Improve Article Tags : Misc JavaScript Web Technologies javascript-array JavaScript-Methods +1 More Explore JavaScript BasicsIntroduction to JavaScript4 min readJavaScript Versions2 min readHow to Add JavaScript in HTML Document?3 min readJavaScript Syntax6 min readJavaScript Output4 min readJavaScript Comments2 min readVariables & DatatypesVariables and Datatypes in JavaScript6 min readGlobal and Local variables in JavaScript4 min readJavaScript Let6 min readJavaScript const5 min readJavaScript Var Statement7 min readOperatorsJavaScript Operators5 min readOperator precedence in JavaScript2 min readJavaScript Arithmetic Operators5 min readJavaScript Assignment Operators5 min readJavaScript Comparison Operators5 min readJavaScript Logical Operators5 min readJavaScript Bitwise Operators5 min readJavaScript Ternary Operator4 min readJavaScript Comma Operator2 min readJavaScript Unary Operators4 min readJavaScript in and instanceof operators3 min readJavaScript String Operators3 min readStatementsJavaScript Statements4 min readJavaScript if-else3 min readJavaScript switch Statement4 min readJavaScript Break Statement2 min readJavaScript Continue Statement1 min readJavaScript Return Statement4 min readLoopsJavaScript Loops3 min readJavaScript For Loop4 min readJavaScript While Loop3 min readJavaScript For In Loop3 min readJavaScript for...of Loop3 min readJavaScript do...while Loop4 min readPerformance & DebuggingJavaScript | Performance4 min readDebugging in JavaScript4 min readJavaScript Errors Throw and Try to Catch2 min readObjectsObjects in Javascript4 min readObject Oriented Programming in JavaScript3 min readJavaScript Objects6 min readCreating objects in JavaScript5 min readJavaScript JSON Objects3 min readJavaScript Object Reference4 min readFunctionsFunctions in JavaScript5 min readHow to write a function in JavaScript ?4 min readJavaScript Function Call2 min readDifferent ways of writing functions in JavaScript3 min readDifference between Methods and Functions in JavaScript3 min readExplain the Different Function States in JavaScript3 min readJavaScript Function Complete Reference3 min readArraysJavaScript Arrays7 min readJavaScript Array Methods7 min readBest-Known JavaScript Array Methods6 min readImportant Array Methods of JavaScript7 min readJavaScript Array Reference4 min readStringJavaScript Strings6 min readJavaScript String Methods9 min readJavaScript String Reference4 min read Like