Segment code into blocks to declare variables and set their values local to the block.
{ float pi := 3.1415926; float circumference := pi * radius; }This declares a variable pi that is local to the block, and uses that variable to set a variable called circumference. Variable declarations (but not type abbreviations) may be interspersed with statements; they need not be at the beginning of a block.
{ string t := 'here'; { string t := 'there'; print(t); } }