Arithmetic Constants

most-positive-fixnum [constant]

#x1fffffff=536,870,911

most-negative-fixnum [constant]

-#x20000000= -536,870,912

short-float-epsilon [constant]

A floating point number on machines with IEEE floating-point format is represented by 21 bit mantissa with 1 bit sign and 7 bit exponent with 1 bit sign. Therefore, floating point epsilon is $2^{-21}= 4.768368 \times 10^{-7}$.

single-float-epsilon [constant]

same as short-float-epsilon, $2^{-21}$.

long-float-epsilon [constant]

same as short-float-epsilon since there is no double or long float. $2^{-21}$.

pi [constant]

$\pi$, actually 3.14159203, not 3.14159265.

2pi [constant]

$2\times \pi$

pi/2 [constant]

$\pi/2$

-pi [constant]

-3.14159203

-2pi [constant]

$-2\times \pi$

-pi/2 [constant]

$\pi/2$