A digraph is a keyword or combination of keys that lets you produce a character that is not available on all keyboards.
The digraph key combinations are:
Key Combination Character Produced <% { %> } <: [ :> ] %% #
Additional keywords, valid in C++ programs only, are:
Keyword Character Produced bitand & and && bitor | or || xor ^ compl ~ and_eq &= or_eq |= xor_eq ^= not ! not_eq !=