This chapter covers the syntax of the Groovy programming language. The grammar of the language derives from the Java grammar, but enhances it with specific constructs for Groovy, and allows certain simplifications.
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Keywords
Identifiers
Normal identifiers
Identifiers start with a letter, a dollar or an underscore. They cannot start with a number.
A letter can be in the following ranges:
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a to z (lowercase ascii letter)
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A to Z (uppercase ascii letter)
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\u00C0 to \u00D6
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\u00D8 to \u00F6
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\u00F8 to \u00FF
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\u0100 to \uFFFE
Then following characters can contain letters and numbers.
Here are a few examples of valid identifiers (here, variable names):
def name
def item3
def with_underscore
def $dollarStart
But the following ones are invalid identifiers:
def 3tier
def a+b
def a#b