Scripting Guide - SAS

Chapter 5 JSL Building Blocks 75
Operators
Comments
Print(tax * Name("taxable income(2011)"));
114000
Name() is harmless when it is not needed. For example, tax and Name("tax") are equivalent.
For more information about how JMP interprets names, see “Name Resolution” on page 97.
Comments are notes in the code that are ignored by the JSL processor (or parser). You include comments to
describe sections of the script. Comments are also convenient for removing portions of a script temporarily.
For example, you can insert comment symbols around code that might be causing an error and then rerun
the script.
Type the comment symbols around code that you want to comment. The following example shows code
commented with /* */ in the middle of a line. When the script is run, JMP considers both expressions to
be identical.
tax /*percentage*/ = .25;
tax = .25;
Table 5.2 describes the comment symbols.
Table 5.2 Comment Symbols
Symbol Syntax Explanation
// // comment Begins a comment. The comment does not have to be at the
beginning of a line, but everything up to the end of the line is a
comment.
/* */ /* comment */ Begins and ends a comment. This comment can appear in the middle
of a line. Script text before and after the comment is parsed normally.
//! //! Add //! to the first line of the script, and the script runs
automatically when opened in JMP. (In other words, the script editor
does not open.)
Operators
Operators are one- and two-character symbols for common arithmetic actions. Operators come in several
varieties:
• infix (with arguments on either side, such as + in 3 + 4, or = in a = 7)
• prefix (with one argument on its right side, such as !a for logical negation)
• or postfix (with one argument on its left side, such as a++ for incrementing a)
JSL operators all have function equivalents.