Lecture
This lecture covers the concept of blocks in Java, which allow grouping instructions and defining variable scope. It explains how blocks are delimited by { and } and how variables declared inside a block have local scope. The instructor emphasizes the importance of declaring variables close to their usage to avoid ambiguity and discusses the rules regarding variable redeclaration. Additionally, the lecture explores variable scope in loops, highlighting that variables declared within an iteration are local to the loop block. Examples and best practices are provided throughout the lecture.