The iswcntrl() is a built-in function in C++ STL which checks if the given wide character is a control character or not. It is defined within the cwctype header file of C/C++.
int iswcntrl(wint_t ch)
Parameter: The function accepts a single mandatory parameter ch which specifies the wide character which we have to check that if it is a control character or not.
Return Value: The function returns two values as shown below:
- If ch is a control character, then a non-zero value is returned.
- If it is not then it returns 0.
Below programs illustrates the above function.
It is a control Character
It is not a control Character
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