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JavaScript ToUpperCase

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The JavaScript ToUpperCase method is used to convert the given string into Uppercase letters.

In this article we will show you, How to write ToUpperCase() Function in JavaScript with example.

ToUpperCase Syntax in JavaScript

The basic syntax of the ToUpperCase function in JavaScript Programming Language is as shown below:

String_Object.ToUpperCase()

String_Object: Please select the valid String Object or String literal.

JavaScript ToUpperCase Example

The following set of examples will help you understand the ToUpperCase() Function.

JAVASCRIPT CODE

<!DOCTYPE html>
<html>
<head>
    <title> Java Script ToUpperCase </title>
</head>
<body>
    <h1> JavaScript ToUpperCase </h1>
<script>
 var Str1 = "Learn JavaScript at Tutorial Gateway";
 
 var Str3 = Str1.toUpperCase();
 var Str4 = "Hi, This is From JS".toUpperCase();
 var Str5 = "javascript uppercase".toUpperCase();
 
 document.write(" <b> Uppercase Letters are: </b> " + Str3);
 document.write(" <br \> <b> Uppercase Letters are: </b> " + Str4);
 document.write(" <br \> <b> Uppercase Letters are: </b> " + Str5);
</script>
</body>
</html>

OUTPUT

JavaScript ToUpperCase

ANALYSIS

Within the Script tag of this to uppercase function, First, we declared the String variables Str1 and assigned corresponding value using following statement

var Str1 = "Learn JavaScript at Tutorial Gateway";

The Following statement will convert the above string into uppercase using ToUpperCase() function

var Str3 = Str1.ToUpperCase();

Instead of declaring and assigning the string, JS allows us to directly use the ToUpperCase() function on string literal

 var Str4 = "Hi, This is From JS".toUpperCase();
 var Str5 = "javascript uppercase".toUpperCase();

Following statements will write the content output to the respective browser

 document.write("<b> Uppercase Letters are:</b> " + Str3);
 document.write("<br \> <b> Uppercase Letters are: </b> " + Str4);
 document.write("<br \> <b> Uppercase Letters are: </b> " + Str5);

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