JavaScript string object toUpperCase method entry instance (for converting letters toUpperCase)

JavaScript method toUpperCase

The toUpperCase method is used to convert (English) strings toUpperCase and return the converted string. The syntax is as follows:

str_object.toUpperCase()

Instance of the toUpperCase method

<script language="JavaScript">
var str = "AaBbCc";

document.write( str.toUpperCase() );
</script>

Run the example and output:

AABBCC

ToLocaleUpperCase method

The toLocaleUpperCase method toUpperCase is essentially the same, and toLocaleUpperCase converts the string toUpperCase locally. Only a few languages, such as Turkish, have locally-specific case mappings.