var a = "Hello world"; var b = 'Hello world';
Additionally, strings can be triple-quoted, which means they are delimited by three (matching) quote characters:
var c = """Hello world"""; var d = '''Hello world''';
A triple quoted string may span multiple lines, and can contain single and double quotes with no need for escaping:
var c = """ Triple-quoted strings can include both "double" and 'single' quotes without escaping. """;