minusp, plusp (Function)

Syntax:

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.