Equation or not?

[DrD]

Using strings, with the associated cost of increased processing time, may become a necessary penalty; because, while it would be desirable to program directly with equations or inequalities, the CAS system evaluates these relations, also the results of inequalities may not be as expected.

For simple program routines, this isn't much of a problem. Larger programs, involving user input or interaction can become quite frustrating. This frustration points out that the hp prime, currently, isn't well suited for this type of program application. (Not the target market). However, the prime has so many desirable attributes, it begs even a novice to attempt to create such larger programs, in spite of the difficulties!