block, comments, variables

 

•JavaScript Blocks

–{…}

–-JavaScript does not have block scope.

–-Blocks should only be used with structured statements

§function, if, switch, while, for, do, try

•JavaScript Comments

–-Single-Line comments : //

–-Multi-Line comments : /*…*/

•JavaScript Variables

–-Variables are "containers" for storing information.

–-var keyword is defined local variable.