JavaScript String

String is a static text that enclosed via a single or double quote

When you wan to use variable inside string . Then  you need to use string literal (backtick) that comes form ES2015 (ES6)

String Concatenation

String concatination is used to join two or more than two string and convert into a single string 

String concatination done by the + operator

Example

<script>  var str1 = "Hello";  var str2 = "JavaScript Developer";  // now we concate str1 and str2  var string = str1 + " " + str2;  //Hello JavaScript Developer </script>

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Note - you can create static string by single quote or double quote 

Tips - When you create string using double quote then you can not use one more double quote inside this string , But you can use single quote

Example

String Literal

String literal use to create string with variable data

Example

<script>  var x=5;  var str = `The integer number is ${x}`; // The integer number is 5 </script>

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Tips  -  You can use only single quotes inside string literal

Problem - You can not use double quotes inside the string literal string 

String()  Function

String can be created via string function

string function return passing parameter in form of string

Example

<script> var numStr = String(8); var boolStr = String(true); var nullStr = String(null); </script>

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toString() function

The toString function also use to convert number, boolean, null and object into string

Example

<script>  var numStr = (8251).toString();  var boolStr = (false).toString();  var nullStr = (null).toStriing(); </script>

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formCharCode

String.formCharCode is used to convert character code into string

Example

String Object

create a string object using new keyword is allow , but is not recommended as it behaves like ,object unlike primitive strings

Example

<script> var strObj = new String('string object'); //check type tyepof strObj // 'object' </script>

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