====== toupper ======
{{tag>character}}
''int toupper(int c)''

===== Description =====
Returns the uppercase version of c. If c is not an ASCII letter, it is returned unchanged.

To change the case of a whole string, use [[StrToUpper]].

===== Examples =====
<code>
toupper('a') -> 'A'
toupper('A') -> 'A'
toupper('/') -> '/' // not a letter
toupper('ä') -> 'ä' // non-ASCII character
</code>

===== See also =====
[[tolower]]