Difference between revisions of "Or"
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A logical (Boolean) operator that returns [[True]] if one or both of its operands are true. Logical operators are used in logical (Boolean) expressions that operate with true/false values. | A logical (Boolean) operator that returns [[True]] if one or both of its operands are true. Logical operators are used in logical (Boolean) expressions that operate with true/false values. | ||
| − | + | == Usage == | |
<syntaxhighlight>E1 Or E2</syntaxhighlight> | <syntaxhighlight>E1 Or E2</syntaxhighlight> | ||
| − | Where: | + | Where: |
| − | + | :'''E''' - true/false expressions. | |
| − | |||
| − | |||
| − | |||
| + | == Notes == | ||
| + | * If one of the true/false expressions evaluates to [[True]], the whole expression is evaluated as true due to the '''or''' logical operator. For example: | ||
| + | :<syntaxhighlight>(10 > 1) or (10 > 20)</syntaxhighlight> | ||
| + | :Will evaluate to [[True]] since the first expression is true, even though the second expression (10 > 20) is false. | ||
| + | * The whole expression is evaluated as true if '''only one''' of the individual expressions evaluates to true. For example: | ||
| + | :<syntaxhighlight>(10 > 100) or (100 < 2000) or (21 = 1)</syntaxhighlight> | ||
| + | :Will evaluate to [[True]] since the second expression (100 < 2000) is indeed true. | ||
| + | * See [[And]] for logical '''and''' true/false expressions. | ||
| + | == Examples == | ||
| + | <syntaxhighlight>2 = 1 Or 2 > 2</syntaxhighlight> | ||
| + | Will return a value of [[False]]. | ||
| + | <syntaxhighlight> | ||
| + | True Or False Or False</syntaxhighlight> | ||
| + | Will return a value of True. | ||
[[Category:Comparisons and Loops]] | [[Category:Comparisons and Loops]] | ||
Latest revision as of 10:24, 19 February 2012
A logical (Boolean) operator that returns True if one or both of its operands are true. Logical operators are used in logical (Boolean) expressions that operate with true/false values.
Usage
E1 Or E2
Where:
- E - true/false expressions.
Notes
- If one of the true/false expressions evaluates to True, the whole expression is evaluated as true due to the or logical operator. For example:
(10 > 1) or (10 > 20)
- Will evaluate to True since the first expression is true, even though the second expression (10 > 20) is false.
- The whole expression is evaluated as true if only one of the individual expressions evaluates to true. For example:
(10 > 100) or (100 < 2000) or (21 = 1)
- Will evaluate to True since the second expression (100 < 2000) is indeed true.
- See And for logical and true/false expressions.
Examples
2 = 1 Or 2 > 2
Will return a value of False.
True Or False Or False
Will return a value of True.
