{ } (Block Delimiter)
A pair of braces ( { } ) is used to surround a block of statements within a debugger command program.
Statements { Statements } Statements
For information about debugger command programs and control flow tokens, see Using Debugger Command Programs.
When each block is entered, all aliases within the block are evaluated. If you alter the value of an alias at some point within a command block, commands subsequent to that point will not use the new alias value unless they are within a subordinate block.
Each block must begin with a control flow token. If you wish to create a block for the sole purpose of evaluating aliases, you should prefix it with the .block token.