| Property | Value |
|---|---|
| Hex Value | $BB4D |
| Categories | |
| Localizations |
|
Real
Overview
Sets mode to display complex results only when you enter complex numbers.
Availability: Token only available from within the Basic editor.
Syntax
Real
Location
mode, Real
Description
The Real command puts the calculator in real number-only mode. This shouldn't be taken quite literally, as you can still type in 𝑖 to get complex numbers, and do operations with them (they will be displayed as in a+b𝑖 mode, in that case). However, any operation done with real numbers that comes out to a complex result, such as taking the square root of a negative number, will throw a ERR:NONREAL ANS error.
There is no real advantage to using Real mode over a+b𝑖 mode — it just adds another error condition that wouldn't be triggered otherwise. However, it is the default setting, and so there's a good chance that the calculator will be in Real mode when someone runs your program. Thus, when using complex numbers implicitly (such as in a quadratic equation solver) you should do something about this.
Advanced Uses
Rather than switch to a+b𝑖 mode, you might want to force the calculations to use complex numbers by making the original argument complex. The general way to do this is by adding +0i to the number. However, there may be an optimization in any particular case. See the quadratic formula routine for a good example of this.
Real
Done
√(-1)
(causes an error)
√(-1+0i)
i
Related Commands
See Also
Source: parts of this page were written by the following TI|BD contributors: burr, DarkerLine, GoVegan.
History
| Calculator | OS Version | Description |
|---|---|---|
| TI-83 | 0.01013 | Added |