How to use arrays on ti=nspire

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Summary:

Having difficulty using arrays.

How to use arrays on ti=nspire

3pi1416 04 Jan 2015 05:21

I am writing a program which requires me to place random integers in an array, sort them and then print them out. Can you steer me to the proper syntax?

Program excerpt
for i=1,10
n(i)=ranint(1,100)
disp n(i)
endfor
for i=1,10
disp n(i)
endfor

This produces two completely different lists of integers - why?

The Berzerk Dragon (guest) 10 Jan 2015 08:25

To reference an element of a list (the TI graphing calculator equivalent of a one-dimensional array) by index, use the format listName[Index]. A variable name followed by parentheses, rather than brackets, is interpreted as a function or program being passed whatever is in the parentheses as arguments.

Additionally, the equal sign is not an assignment operator. There are three ways to set a variable, where Var is the variable name and Expr is the expression to be evaluated and stored:
1. Var := Expr
2. Expr =: Var
3. Same as 2, but replace =: with the symbol you get by pressing ctrl+var on the keypad.

So your loop, rewritten with correct syntax, becomes:
For i, 1, 10
n[i] := randInt(1, 100)
Disp n[i]
EndFor

Dan Watt (guest) 13 Jan 2015 23:29

Thank you so much for your response