Syntax offers conditional statements that are executed only if conditions are right. Usually those conditions are determined by evaluating the contents of a variable with a logical or relational operator. The following table lists the logical operators you can use for longer, complex comparisons:
| Symbol | Alpha | Definition |
|---|---|---|
| & | AND | Both relational operators must be true |
| | | OR | Either relational operator can be true |
| ~ | NOT | Reverses the result of a relational operator |
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Source:http://www.dummies.com/how-to/content/spss-syntax-language-logical-operators.html
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