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Integer and floating-point literals

Literals or constants that represent numbers can be integer or floating-point.

Integer literals

An integer constant is a sequence of the digits 0-9, with an optional positive (+) or negative (-) sign preceding the digits.

Syntax

[ + | - ] digit ...

Examples

Valid integers include the following:

23
-555
+17

Floating-point literals

Floating-point literals (also referred to as decimal, numeric, or fractional literals) are sequences of digits that can include a decimal point, and optionally the exponent marker (e).

Syntax

[ + | - ] digit ... [ . ] [ digit ...]
[ e | E [ + | - ] digit ... ]

Arguments

Examples

Valid floating-point literals include the following:

3.14159
-37.
2.0e19
-2E-19