@end example
@end defun
+@defvar float-e
+The mathematical constant @math{e} (2.71828@dots{}).
+@end defvar
+
+@defvar float-pi
+The mathematical constant @math{pi} (3.14159@dots{}).
+@end defvar
+
@node Predicates on Numbers
@section Type Predicates for Numbers
@cindex predicates for numbers