Numeric constant

The "num-constant" parameter represents a number consisting mainly of the digits 0-9; other optional elements are a decimal point (.), a minus sign (-) to indicate a negative number, and a plus sign (+) to indicate a positive number (unsigned numbers are assumed to be positive). If a sign is specified, it must precede the digits. Spaces are not allowed in a numeric constant.

Integers, fixed-point numbers and floating point numbers (numbers in exponential notation) are three types of numeric constants. See the following examples:

Number

44

+15.38

-86.34

10,000

Integer

44

n/a

n/a

10000

Fixed Point

44

+15.38

-86.34

10000

Exponential

4.4E+1

1.538E+1

-8.634E+1

1E+4