Floating point f0 and d0 suffixes for exponential notation?

[ornamentist]

We can fix the type of a floating point literal with an f0 or d0 suffix:

(define float-x 123.456f0)

(define double-x 123.456d0)

But this isn't supported for floating point constants in exponential form?

(define exp-float-x 123.4e-10f0) ;; error

(define exp-double-x 123.4d10d0) ;; error

[eliaslfox]

Surprisingly, in common lisp f and d are exponent markers.

(define exp-float-x 12.4f-10)

(define exp-double-x 123.4d10)

[ornamentist]

Aha -- that explains it.

[stylewarning]

And note that the exponent marker e/E is interpreted depending on the variable cl:*read-default-float-format*, so it's best not to use it. Stick to f and d.

[ornamentist]

Will do.