Definition: A condition is a statement that is true or false.
Regulation: In GeoGebra, a condition can be part of an object or an object called a Boolean Value.

Interactivity 1: Boolean value   Directions for interactivity

1. Click and drag slider a and watch b change from true to false in the text at right (and at left).
2. Right-click on b in the algebra window at left. You will see that it is defined as Boolean Value b: a>0.
   (see Conditions Screencast 1 below)

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Regulation: In GeoGebra, the only typeable conditional operators are “<” and “>”.

   ALL other conditional operators must be input from the drop-down menu under the ° (degree sign).

To test whether "a equals 1"?

We CANNOT type a=1 .
We must type a \mathop = \limits^? 1 . (see Screencast 1)
 1. Type a, then click on right of °
 2. Select \mathop = \limits^? from menu and then type 1.

  
  

GeoGebra Conditions on Showing Text Screencast 1

Under construction ...

 


 “V” is “or”   and    “Λ” is “and”.
3. If you have GeoGebra, double-click somewhere in the graphics window to open the file for editing.
   3.a Click in the input window at bottom and type a>1. GeoGebra will define a new Boolean Value c which is true when

 

Note:
Advanced commands do NOT work well in 3.0. The conditions are erased every time you touch the variable, so you must CHECK EVERY TIME that they are there. This is a REAL PAIN.
There is no solution in 3.0.  In 3.2, the conditions work well.
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Page last modified on May 25, 2009, at 04:50 AM