MOO Language Expressions

Expressions are those pieces of MOO code that generate values; for example, the MOO code

3 + 4

is an expression that generates (or "has" or "returns") the value 7. There are many kinds of expressions in MOO, all of them discussed below.

• Expression Errors: Errors While Evaluating Expressions
• Literals: Writing Values Directly in Verbs
• Variables: Naming Values Within a Verb
• Arithmetic: Arithmetic Operators
• Comparisons: Comparing Values
• Truth Values: Values as True and False
• Indexing: Indexing into Lists and Strings
• More On Lists: Other Operations on Lists
• Scattering: Spreading List Elements Among Variables
• Property Values: Getting and Setting the Values of Properties
• Calling: Calling Built-in Functions and Other Verbs
• Catch: Catching Errors in Expressions
• Precedence: Parentheses and Operator Precedence

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