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Isetl guide ISETL Getting Started Guide Running ISETL To open ISETL ? If there is an icon named ISETL visible double click on the icon ? If there is no icon see your Lab Information Sheet for details speci ?c to each di ?erent lab on campus After some tim

ISETL Getting Started Guide Running ISETL To open ISETL ? If there is an icon named ISETL visible double click on the icon ? If there is no icon see your Lab Information Sheet for details speci ?c to each di ?erent lab on campus After some time a window appears with menus at the top and a message Basic operation of ISETL ? Type instructions at the prompt ? Complete an expression with a semicolon ? Press or If you enter ISETL Responds ? The menus above the Execution window are standard Macintosh menus Three kinds of input ? an expression to evaluate ? an instruction statement ? a directive In ISETL you can use either or interchangeably If you get a prompt your input is not complete Check that you typed the semicolon ISETL prints results at the left margin of your screen To quit ISETL ? Open the File menu and select the Quit option or type the directive As with other applications be sure quit to quit before ending a session ? ISETL then gives you a choice to Save Discard or Cancel Select an option by clicking on it Save will save the entire work session in a ?le Discard exits without saving Cancel nulli ?es the Quit command and puts you back in ISETL Execution window vs Text window When ISETL starts up the Execution window is opened Choosing New or Open from the File menu opens text windows which are not interactive ? Running ISETL in the Execution window allows you to check code line by line as you submit it The Windows version of ISETL does not currently support text windows This feature can be emulated by using a text editor like Notepad at the same time ? Text windows allow you to write and save longer sections of ISETL code without executing each line ? ISETL code must be moved from a text window into the Execution window for ISETL to process it See page for instructions on how to bring up code from a text window for execution CEntering ISETL input interactively Enter your ISETL expression at a prompt You may use ? constants ? identi ?ers variables ? keywords and symbols To complete your input ? Type a semicolon then enter ISETL evaluates your expression and displays the value at the left margin below your last line of input a e- e- or true ISETL Guide ?? When ISETL is ready to receive information a prompt appears ISETL evaluates assigns that value to a and returns a new prompt awaiting next input ISETL evaluates an expression in standard scienti ?c notation and produces a prompt ? e ? is shorthand for ? ten to the ? power ISETL evaluates an expression using or as a keyword and produces a prompt To respond to a prompt ? Type then if semicolon was omitted ISETL will process the completed expression or true ?? OR ?? ? Type the directive clear then