variable

A named storage location that can contain data that can be modified during program execution. Each variable has a name that uniquely identifies it within its level of scope. A data type can be specified or not.

Variable names:

• Must begin with an alphabetic character.
  
  
• Can't contain an embedded period or type-declaration character.
  
  
• Must be unique within the same scope.
  
  
• Must be no longer than 255 characters.