An ellipsis indicates that the language element can be repeated. An ellipsis following an option enclosed in braces indicates that you can repeat the format of the whole option. A vertical ellipsis indicates the continuation of a body of program code which is not a defined block of code. The frame consists of the two highlighted bars across the top of the screen and the three highlighted bars across the bottom. You can recall the last 100 previously entered commands or statements by using the UP and DOWN arrow keys.
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As you try out the examples in this manual, be sure to type spaces where they are shown. Here is a sample program for you to try. Enter each line exactly as shown. At this point, you can either retype the line, or you can correct the line. Now that you have typed in the sample program, you are ready to run it.