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| 2.1 Conventions Used in this Handbook
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| The following notation conventions are used in this Handbook:
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| KEYWORDS
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| Capital letters indicate NS Basic/App Studio keywords and other text that must be typed exactly as shown. For the purposes of this manual, uppercase text indicates a required part of the Statement syntax. NS Basic/App Studio is case-insensitive: keywords are accepted with either uppercase letters, lowercase letters, or any mixture of the two. A keyword such as PRINT may be entered into your programs as print, Print, or PRINT.
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| placeholders
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| Italic text indicates a placeholder for types of information that you must supply. In the following Statement, expression is italicized to show that the EXECUTE statement requires an expression:
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| EXECUTE expression
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| Example
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| This Monaco typeface indicates example program code and information that is printed on your NS Basic/App Studio screen. The following example shows a line from an NS Basic/App Studio program:
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| PRINT "Hello World!"
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| [Optional]
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| Brackets indicate that the enclosed items are optional. In the following example, brackets are used to show that entering a second item to display on the screen is optional for the PRINT statement:
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| PRINT expression1 [ ,expression2 ]
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| Both of these PRINT statements are legal, since PRINT accepts up to 20 expressions:
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| PRINT "Hello"
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| PRINT "Hello","World"
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| The vertical bar indicates that the items are mutually exclusive. In the following example the bar indicates that the LEN function can either be used with a string or a variable name:
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| LEN(string | variable)
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| 2.2 The Elements of an NS Basic/App Studio Program
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| A program in NS Basic/App Studio is a set of Statements. Each NS Basic/App Studio program line may consist of the following elements:
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| KEYWORD arguments 'comment
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| A KEYWORD is a word from the language that NS Basic/App Studio understands. Examples are PRINT, INPUTBOX and IF. The Statement and its arguments determine what action (if any) will be taken by NS Basic/App Studio when the line is executed.
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| Any text following ' on a line is a comment, and is ignored by NS Basic/App Studio.
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| 2.2.1 Multi-Line Statements
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| Each NS Basic/App Studio statement normally ends at the end of the statement line. If you have a very complex statement the line can be very long. This can make your programs difficult to read. You may split long statements by using the line-continuation sequence, a space followed by an underscore, ( _) at the end of the
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