Tool to convert a text to uppercase. Only works with a-z, no accents or non-Latin letters supported. See also [url=http://www.geogebratube.org/material/show/id/241]ToLowerCase[][/url].
[i]Examples:[/i]
ToUpperCase["abc"] = "ABC"
ToUpperCase["ABC"] = "ABC"
ToUpperCase["ábc"] = "áBC"
ToUpperCase["AbC"] = "ABC"
