Calculators Question about a key in the ti-89

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The diamond + stor -> key on the TI89 calculator is not widely recognized, leading to confusion among users. The @ symbol, commonly seen during computations, represents an arbitrary integer. According to the TI89 manual, when this arbitrary integer appears multiple times in a session, it is numbered consecutively up to 255, after which it restarts at @n0. Users can reset the numbering using the Clean Up 2:NewProb function. For further clarification, consulting the manual or the company's website help section is recommended.
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i am having trouble finding out what the diamond + stor -> key do. i don't know what that symbol means
 
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anybody know what this key means?
 
Don't you have a manual for it? :confused:
If not, maybe try out the company's website help section. Personally, I've never even seen one of those devices.
 
I've seen the @ symbol a few times when I do certain computations. @ indicates an arbitrary integer and the TI89 manual has also given @ the name arbitrary. Here is what the TI89 manual (pg. 80; Symbolic Manipulation) had to say:
When an arbitrary
integer occurs multiple
times in the same
session, each
occurrence is numbered
consecutively. After it
reaches 255, arbitrary
integer consecutive
numbering restarts at
@n0. Use Clean Up
2:NewProb to reset to
@n1.
ˆ
 

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