Difference between revisions of "Begin-End for Grouping Expressions"

Revision as of 13:38, 15 December 2015

Analytica User GuideBegin-End for Grouping Expressions

As illustrated above, you can group several expressions (statements) as the definition of a variable or function simply by separating them by semicolons (;). To group several expressions as a condition or action of If a Then b Else c or While a Do b, or, indeed, anywhere a single expression is valid, you should enclose the expressions between Begin and End, or between parentheses characters ( and ).

The overall value of the group of statements is the value from evaluating the last expression. For example:

(VAR x := 10; x := x/2; x - 2) → 3

Analytica also tolerates a semicolon (;) after the last expression in a group. It still returns the value of the last expression. For example:

(VAR x := 10; x := x/2; x/2;) → 2.5

The statements can be grouped on one line, or over several lines. In fact, Analytica does not care where new-lines, spaces, or tabs occur within an expression or sequence of expressions — as long as they are not within a number or identifier.

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 <breadcrumbs> Analytica User Guide > {{PAGENAME}}</breadcrumbs><br />
+As illustrated above, you can group several expressions (statements) as the definition of a variable or function simply by separating them by semicolons (;). To group several expressions as a condition or action of <code>If a Then b Else c</code> or <code>While a Do b</code>, or, indeed, anywhere a single expression
+is valid, you should enclose the expressions between '''<code>Begin</code>''' and '''<code>End</code>''', or between parentheses characters ( and ).
+The overall value of the group of statements is the value from evaluating the last expression. For example:
+<code>(VAR x := 10; x := x/2; x - 2) → 3</code>
+Analytica also tolerates a semicolon (<code>;</code>) after the last expression in a group. It still returns the value of the last expression. For example:
+<code>(VAR x := 10; x := x/2; x/2;) → 2.5</code>
+The statements can be grouped on one line, or over several lines. In fact, Analytica does not care where new-lines, spaces, or tabs occur within an expression or sequence of expressions — as long as they are not within a number or identifier.<br />
 <footer>Summary of Programming Constructs / {{PAGENAME}} / Local Variables</footer>