iswlower - cppreference.com (original) (raw)

| | | | | --------------------------- | | ----------- | | int iswlower( wint_t ch ); | | (since C95) |

Checks if the given wide character is a lowercase letter, i.e. one of abcdefghijklmnopqrstuvwxyz or any lowercase letter specific to the current locale.

[edit] Parameters

[edit] Return value

Non-zero value if the wide character is an lowercase letter, zero otherwise.

[edit] Notes

ISO 30112 specifies which Unicode characters are include in POSIX lower category.

[edit] Example

#include <locale.h> #include <stdio.h> #include <wchar.h> #include <wctype.h>   int main(void) { wchar_t c = L'\u0444'; // Cyrillic small letter ef ('ф') printf("In the default locale, iswlower(%#x) = %d\n", c, !!iswlower(c)); setlocale(LC_ALL, "en_US.utf8"); printf("In Unicode locale, iswlower(%#x) = %d\n", c, !!iswlower(c)); }

Output:

In the default locale, iswlower(0x444) = 0 In Unicode locale, iswlower(0x444) = 1

[edit] References

• C23 standard (ISO/IEC 9899:2024):

• 7.30.2.1.7 The iswlower function (p: TBD)

• C17 standard (ISO/IEC 9899:2018):

• 7.30.2.1.7 The iswlower function (p: TBD)

• C11 standard (ISO/IEC 9899:2011):

• 7.30.2.1.7 The iswlower function (p: 450)

• C99 standard (ISO/IEC 9899:1999):

• 7.25.2.1.7 The iswlower function (p: 396)

[edit] See also