Javascript String Type

Introduction

Javascript String data type represents a sequence of zero or more 16-bit Unicode characters.

Strings can be delineated by either double quotes ", single quotes ', or backticks `. 

let firstName = "css"; 
let lastName = 'html'; 
let lastName = `long string`

A string beginning with a certain character must end with the same character.

For example, the following will cause a syntax error: 

let firstName = 'css";  // syntax error - quotes must match

String methods charAt, charCodeAt, fromCharCode, toLowercase and toUpperCase. 

let s = "ZEBRA";
let s2 = "AbCdEfG";
 
console.log( "Character at index 0 in '" + s + "' is " + s.charAt( 0 ) );
console.log( "Character code at index 0 in '"
   + s + "' is " + s.charCodeAt( 0 ) ); 
   //from   w ww.j  av  a2 s. c o m
console.log( 
   String.fromCharCode( 87, 79, 82, 68 ) + 
   "' contains character codes 87, 79, 82 and 68" )
   
console.log( s2 + " in lowercase is '" +
   s2.toLowerCase() + "'" );       
console.log( s2 + "' in uppercase is '"
   + s2.toUpperCase() );



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