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Javascript Theory

String

A string is a combination of characters, which are widely used in JavaScript programming. In javascript strings are treated as objects.

Creating a string:

String Declaration

There are two ways to create string.

  • String Literal
    var str = "Skill Pundit";
  • Using New Keyword
    var str = new String("SkillPundit");

String length() function

This function is used to find the length of the string.

Example
var a = "Skillpundit";
var b = a.length();
document.write(b); // Output : 11

String compareTo()function

This function is used to compares the given string with current string.

Example
var a = "Skill";
var b = "Pundit";
var c = "Skill";
document.write(a.compareTo(b)); // Output :greater than zero (because both are not equal)
document.write(a.compareTo(c)); // Output : 0(because both are equal)
{
https://www.tutorialrepublic.com/javascript-reference/javascript-string-object.php
 }

String concat() funcion

This function is used to concates of given two strings.

Example
var a = "Skill";
var b = "Pundit";
var c = a.concat(b);
document.write(c); // Output :SkillPundit

ToLowerCase() function

This function is used to convert the given string characters into lower case characters.

Example
var a = "SKILLPUNDIT"
var b = a.toLowerCase();
document.write(b); // Output : skillpundit

ToUpperCase() function

This function is used to convert the given string characters into upper case characters.

Example
var a = "skillpundit"
var b = a.toUpperCase();
var c = a.concat(b);
document.write(b); // Output : SKILLPUNDIT