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# char32_t

From cppreference.com
< c‎ | string‎ | multibyte

Defined in header `<uchar.h>` |  | (since C11)
typedef uint_least32_t char32_t; |  | (since C11)
typedef /*implementation-defined*/ uint_least32_t; |  | (since C99)

char32_t is an unsigned integer type used for 32-bit wide characters and is the same type as uint_least32_t.

uint_least32_t is the smallest unsigned integer type with width of at least 32 bits.

### [edit] Notes

On any given platform, the width of type char32_t can be greater than 32 bits, but the actual values stored in an object of type char32_t will always have a width of 32 bits.

### [edit] Example

Run this code

    #include <uchar.h>
    #include <stdio.h>

    int main(void)
    {
        char32_t wc[] = U"zß水🍌"; // or "z\u00df\u6c34\U0001f34c"
        size_t wc_sz = sizeof wc / sizeof *wc;
        printf("%zu UTF-32 code units: [ ", wc_sz);
        for (size_t n = 0; n < wc_sz; ++n) printf("%#x ", wc[n]);
        printf("]\n");
    }

Possible output:

    5 UTF-32 code units: [ 0x7a 0xdf 0x6c34 0x1f34c 0 ]

### [edit] References

- C11 standard (ISO/IEC 9899:2011):

  - 7.28 Unicode utilities <uchar.h> (p: 398)

  - 7.20.1.2 Minimum-width integer types (p: 290)

- C99 standard (ISO/IEC 9899:1999):

  - 7.18.1.2 Minimum-width integer types (p: 256)

### [edit] See also

C++ documentation for char32_t

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