HOW TO USE A LETTERS STRING ?

How to save a letters string in a program ?
Ex:We would like to ask for the name of the user and then display it.

We must use the input command in order to ask a question
:Clrhome..........................................To clear the text screen
:Input "your name",STR1..................To ask this question: "your name" and the answer will be stored in the STR1 Variable (The STR Variables are in the Vars Menu)
The TI-83 contains only 10 STR.

Then we must display the name with the output command.
:Clrhome.........................................To clear the text screen
:Output(3,3,"Your name is:")............Display "your name is:"
:Output(4,2,STR1)..........................Display STR1 (For example here, the name) on the text screen.
:Pause.............................................To make a pause during the display of the name.

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If you have or find another lessons, send it to me, it will help other people who want learn asm.