The towupper() is a built-in function in C/C++ which converts the given wide character into uppercase. It is defined within the cwctype header file of C++.
wint_t towupper( wint_t ch )
Parameter: The function accepts a single mandatory parameter ch which specifies the wide character which we have to convert into uppercase.
Return Value: The function returns two values as shown below.
- If the ch has a uppercase version, then it is converted into it.
- If it is not then no modification happens.
Below programs illustrates the above function.
The uppercase version of "GeeksforGeeks" is GEEKSFORGEEKS
The uppercase version of "hello Ishwar 123!@#" is HELLO ISHWAR 123!@#
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