test whether a number is positive
Major Section:  ACL2-BUILT-INS

(Plusp x) is true if and only if x > 0.

The guard of plusp requires its argument to be a rational (real, in ACL2(r)) number.

Plusp is a Common Lisp function. See any Common Lisp documentation for more information.

To see the ACL2 definition of this function, see pf.