# std::char_traits<CharT>::copy

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< cpp‎ | string‎ | char traits

static char_type* copy( char_type* dest, const char_type* src, std::size_t count ); |  | (until C++20)
static constexpr char_type* copy( char_type* dest, const char_type* src, std::size_t count ); |  | (since C++20)

Copies count characters from the character string pointed to by src to the character string pointed to by dest.

Formally, for each `i` in `[`​0​`,` count`)`, performs assign(src[i], dest[i]).

The behavior is undefined if the character ranges `[`dest`,` dest + count`)` and `[`src`,` src + count`)` overlap.

### Parameters

dest | - | pointer to a character string to copy to
src | - | pointer to a character string to copy from
count | - | the number of characters to copy

### Return value

dest

### Exceptions

Throws nothing.

### Complexity

Linear.

### See also

assign [static] | assigns a character (public static member function)

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