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:
The symbol single-float.
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. => (1.0 1.0 1.0s0 1.0 1.0 1.0) ;Implementation has float formats S and F. => (1.0d0 1.0d0 1.0 1.0 1.0d0 1.0d0) ;Implementation has float formats F and D. => (1.0d0 1.0d0 1.0s0 1.0 1.0d0 1.0d0) ;Implementation has float formats S, F, D. => (1.0d0 1.0d0 1.0 1.0 1.0d0 1.0L0) ;Implementation has float formats F, D, L. => (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.
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