B.5 Statements and Blocks

Programs are composed of statements often grouped together into blocks.

A statement ends with a semicolon (;), which is optional for the last statement in a block.

A block is one or more statements usually surrounded by curly braces; here's an example:

{
  $thousand = 1000;
  print $thousand;
}

Blocks may stand by themselves but are often associated with such constructs as loops or if statements.