Newer keyboards can reproduce the Euro sign on the screen monitor but when the same text is published online, the Euro sign (i.e. the currency symbol for EURO) can be garbled in the browser, depending upon the code setting.
For example, to render the Euro currency sign correctly online for the standard code setting on most English-language browsers, we use the HTML code
€in writing our text in Blogger.
This conforms to the W3C HTML 4.0 standard which supports ISO 8859-1 (Latin-1) characters, the standard code setting in Microsoft's Internet Explorer browser as also the prevailing character encoding "Western (ISO 8859-1)" in the browser Mozilla FireFox.
If this specific character code is not inserted in Blogger's "Edit Html" textbox to replace the Euro sign which the keyboard produces, the Blogger textbox will correctly render the Euro sign on the screen monitor, but the Euro currency sign when published online will appear as garble for most standard browser settings.
Problems and Solutions involving Euro sign usage online are found at:
The euro sign in HTML and in some other contexts