8.5.1.1 Constants

A string constant is a sequence of characters, enclosed in single quotes, for example: 'public'. A string constant may contain any sequence of digits (0-9), letters (a-z, A-Z), whitespace, and the underscore (_).

Number constants (integer or floating point) are denoted in the usual way:

• preceded by an optional sign (+ or -)
• always use a dot as decimal point
• if you use scientific notation, separate the exponent from the mantissa with a 'e' or 'E', like so: -0.234e-5 or 1.2E34