I was making a program that displays a matrix style ( lots of 0s, and 1s). When I run the program, i get an error: DATA TYPE
Code:
While K!=45
getKey->K
randInt(0,1,15)->L1
For(A,1,dim(L1
Ans+sub("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ ",1+L1(A),1
End
sub(Ans,2,length(Ans)-1->Str1
Disp Str1
End
That's because Ans in
Code: Ans+sub("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ ",1+L1(A),1
is a integer (or list), it needs to be a string for that to work. 
Could I use toString instead of all of this?
Code:
While K!=45
getKey->K
randInt(0,1,15)->L1
For(A,1,dim(L1
Ans+sub("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ ",1+L1(A),1
End
sub(Ans,2,length(Ans)-1->Str1
Disp Str1
End
The code you posted is a bit weird. L1 only contains values from 0-1, so I don't see why you would want to have 37 characters in the string. If you want to have a string with 15 random 1s and 0s, you could do this:
Code: While K!=45
toString(randInt(0,1
For(A,1,14
Ans+toString(randInt(0,1
End
Disp Ans
End
As TheLastMillennial pointed out, Ans has to be a string.
I was in a hurry at school, so I just copied the list to string from ti basic wiki, just to see if would work. That is why it looks weird.
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