Compiler-Design

The input string is alternately scanned left to right and right to left with k reversals.

Input string is scanned once Left to Right with rightmost derivation and k symbol look-ahead

LR(k) grammers are expressively as powerful as context-free grammers.

Parser makes k left-to-right passes over input string

Input string is scanned from left to right once with k symbol to the right as look-ahead to give left-most
derivation.