Summary of changes appears on https://en.wikipedia.org/wiki/C23_(C_standard_revision)

A few of my highlights/to be aware of: * Add nullptr constant for nullptr_t type * Add true and false keywords * Add ' digit separator to literal constants, such as 0xFE'DC'BA'98 * The meaning of the auto keyword was changed to cause type inference while also retaining its old meaning of a storage class specifier if used alongside a type. Unlike C++, C23 allows type inference only for object definitions (no inferring function return type or function parameter type). * Add char8_t type for storing UTF-8 encoded data and change the type of u8 character constants and string literals to char8_t