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# std::system_error::what

From cppreference.com
< cpp‎ | error‎ | system error

virtual const char* what() const; |  | (since C++11)

Returns the explanatory string.

### [edit] Parameters

(none)

### [edit] Return value

Pointer to a null-terminated string with explanatory information.

### [edit] Exceptions

`noexcept` specification:
noexcept

### [edit] See also

code | returns error code (public member function) [edit]

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Category:

- unconditionally noexcept