Literals

Element	Syntax and Specifications
String literals	Zero or more characters enclosed in single quotes
Exact numeric literals	Numeric long integer values, signed and unsigned
Approximate numeric literals	Numeric double values in scientific notation or numeric double values with a decimal, signed or unsigned
Boolean literals	true or false

An example of a numeric double value in scientific notation is:

 -30.9E7 

An example of a double value with a decimal:

 -92.8