Difference between revisions of "Begin-End for Grouping Expressions"
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<breadcrumbs> Analytica User Guide > {{PAGENAME}}</breadcrumbs><br /> | <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 | + | As illustrated above, you can group several expressions (statements) as the definition of a variable or function simply by separating them by semicolons (<code>;</code>). 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 | + | is valid, you should enclose the expressions between <code>Begin</code> and <code>End</code>, or between parentheses characters <code>(</code> and <code>)</code>. |
The overall value of the group of statements is the value from evaluating the last expression. For example: | 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> | + | :<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: | 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> | + | :<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 /> | 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> | <footer>Summary of Programming Constructs / {{PAGENAME}} / Local Variables</footer> | ||
Revision as of 13:24, 20 December 2015
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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