3.258 toupper

Function

Convert a character into its upper case representation.

Header

ctype.h

Declaration

int __fastcall__ toupper (int c);

Description

The function returns the given character converted to upper case. If the given character is not a letter, it is returned unchanged.

Limits

• The function is only available as fastcall function, so it may only be used in presence of a prototype.

Availability

ISO 9899

See also

islower, isupper, tolower

Example

None.