Literals are constants of built-in types (numerical, boolean, character, character string, and pointer) that cannot be altered in a program. The language defines a series of prefixes and suffixes to specify literals (and the prefix/suffix is actually part of the literal). C++11 allows creating user-defined literals by defining functions called literal operators that introduce suffixes for specifying literals. These work only with numerical character and character string types. This opens the possibility of defining both standard literals in future versions and allows developers to create their own literals. In this recipe, we will see how we can create our own cooked literals.