► |  | How to Design Programs Languages

1 | Beginning Student
2 | Beginning Student with List Abbreviations
3 | Intermediate Student
4 | Intermediate Student with Lambda
5 | Advanced Student
| Index

▼ | 1 | Beginning Student

1.1 | define
1.2 | define-struct
1.3 | Function Calls
1.4 | Primitive Calls
1.5 | cond
1.6 | if
1.7 | and
1.8 | or
1.9 | Test Cases
1.10 | empty
1.11 | Identifiers
1.12 | Symbols
1.13 | true and false
1.14 | require
1.15 | Primitive Operations

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#### 1.8`` or

( or expr expr expr ...)

The exprs are evaluated from left to right. If the first expr evaluates to true, the or expression immediately evaluates to true. If the first expr evaluates to false, the next expression is considered. If all exprs evaluate to false, the or expression evaluates to false. If any of the expressions evaluate to a value other than true or false, it is an error.
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