Variable *READ-DEFAULT-FLOAT-FORMAT*

Value Type

one of the atomic type specifiers short-float, single-float, double-float, or long-float, or else some other type specifier defined by the implementation to be acceptable.

Initial Value

Description

Controls the floating-point format that is to be used when reading a floating-point number that has no exponent marker or that has e or E for an exponent marker. Other exponent markers explicitly prescribe the floating-point format to be used.

The printer uses *read-default-float-format* to guide the choice of exponent markers when printing floating-point numbers.

Examples

(let ((*read-default-float-format* 'double-float)) (read-from-string "(1.0 1.0e0 1.0s0 1.0f0 1.0d0 1.0L0)"))

(1.0 1.0 1.0 1.0 1.0 1.0) ; Implementation has float format F.

or (1.0 1.0 1.0s0 1.0 1.0 1.0) ; Implementation has float formats S and F.

or (1.0d0 1.0d0 1.0 1.0 1.0d0 1.0d0) ; Implementation has float formats F and D.

or (1.0d0 1.0d0 1.0s0 1.0 1.0d0 1.0d0) ; Implementation has float formats S, F, D.

or (1.0d0 1.0d0 1.0 1.0 1.0d0 1.0L0) ; Implementation has float formats F, D, L.

or (1.0d0 1.0d0 1.0s0 1.0 1.0d0 1.0L0) ; Implementation has formats S, F, D, L.

Affected By

None.

See Also

None.

Notes

None.