12.2.17 minusp, plusp [Function]

minusp real ⇒ generalized-boolean

plusp real ⇒ generalized-boolean

Arguments and Values::

real—a real.

generalized-boolean—a generalized boolean.

Description::

minusp returns true if real is less than zero; otherwise, returns false.

plusp returns true if real is greater than zero; otherwise, returns false.

Regardless of whether an implementation provides distinct representations for positive and negative float zeros, (minusp -0.0) always returns false.

Examples::

 (minusp -1) ⇒  true
 (plusp 0) ⇒  false
 (plusp least-positive-single-float) ⇒  true

Exceptional Situations::

Should signal an error of type type-error if real is not a real.