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Advanced Editing FunctionalityThis routine adds several features that are not in the other versions. It allows for uppercase and lowercase text with switching in between them. It allows the user to move the cursor throughout the text and insert text and delete text where ever they would like. The user can also clear the current text and start over. Unfortunately, the code is a little hard to decipher, but we'll work through it. The main deficit of this program is that it is incompatible with the TI-83. This can be remedied, as explained below.:"ABC abc DEFGHdefghIJKLMijklmNOPQRnopqrSTUVWstuvwXYZ(Theta)!xyz(Theta). :? :? →Str0:" →Str1 // 2 spaces in quotes:DelVar M1→P:Repeat K=105 and 2<length(Str1:Text(0,0,sub(Str1,1,length(Str1)-P)+"|"+sub(Str1,1,length(Str1)-P+1,P)+" // 5 spaces after quote:Repeat Ans:getKey→K:End:P-(K=26 and Z>1)+(K=24 and Z<length(Str1)-1→P:M xor K=31→M:If K>40 and K<105 and K≠44 and K≠45:sub(Str1,1,length(Str1)-P)+sub(Str0,K-40+5M,1)+sub(Str1,1,length(Str1)-P+1,P→Str1:If K=23 and P<length(Str1)-1:sub(Str1,1,length(Str1)-P-1)+sub(Str1,length(Str1)-P+1,P→Str1:If K=45:Then:" →Str1 // 2 spaces in quotes:1→P:End:End:sub(Str1,2,length(Str1)-2→Str1

sub(Str1,1,length(Str1)-P+1,P

sub(Str1,1,length(Str1)-P+1,P→Str1... 1 2 3 4