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Operator associativity

Operator                               Associativity  ++, --                                 Not applicable  -, ~, !                                Right-to-left  **                                     Right-to-left  =~, !~                                 Left-to-right  *, /, %, x                             Left-to-right  +, -, .                                Left-to-right  <<, >>                                 Left-to-right  <, <=, >, >=, lt, le, gt, ge           Left-to-right  ==, !=, <=>, eq, ne, cmp               Left-to-right  &                                      Left-to-right  |, ^                                   Left-to-right  &&                                     Left-to-right  ||                                     Left-to-right  ..                                     Left-to-right  ? and :                                Right-to-left  =, +=, -=, *=,                         Right-to-left  ,                                      Left-to-right  not                                    Left-to-right  and                                    Left-to-right  or, xor                                Left-to-right