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<h2>Comments</h2>
<pre><code>// Single line comment
/// Documentation single line comment
/* Block comment
on several lines */
/** Multi-line
doc comment */</code></pre>
<h2>Annotations</h2>
<pre><code>@todo('seth', 'make this do something')
@deprecated // Metadata; makes Dart Editor warn about using activate().</code></pre>
<h2>Numbers</h2>
<pre><code>var x = 1;
var hex = 0xDEADBEEF;
var bigInt = 346534658346524376592384765923749587398457294759347029438709349347;
var y = 1.1;
var exponents = 1.42e5;
</code></pre>
<h2>Strings</h2>
<pre><code>var s1 = 'Single quotes work well for string literals.';
var s2 = "Double quotes work just as well.";
var s3 = 'It\'s easy to escape the string delimiter.';
var s4 = "It's even easier to just use the other string delimiter.";
var s1 = '''
You can create
multi-line strings like this one.
''';
var s2 = """This is also a
multi-line string.""";
var s = r"In a raw string, even \n isn't special.";</code></pre>
<h2>Full example</h2>
<pre><code>class Logger {
final String name;
bool mute = false;
// _cache is library-private, thanks to the _ in front of its name.
static final Map<String, Logger> _cache = <String, Logger>{};
factory Logger(String name) {
if (_cache.containsKey(name)) {
return _cache[name];
} else {
final logger = new Logger._internal(name);
_cache[name] = logger;
return logger;
}
}
Logger._internal(this.name);
void log(String msg) {
if (!mute) {
print(msg);
}
}
}</code></pre>
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