func debugPrint(_: Any..., separator: String, terminator: String) Writes the textual representations of the given items most suitable for debugging into the standard output. You can pass zero or more items to the debugPrint(_:separator:terminator:) function. The textual representation for each item is the same as that obtained by calling String(reflecting: item). The following example prints the debugging representation of a string, a closed range of integers, and a group of floating-point values to standard output: debugPrint("One two three four five") // Prints "One two three four five" debugPrint(1...5) // Prints "CountableClosedRange(1...5)" debugPrint(1.0, 2.0, 3.0, 4.0, 5.0) // Prints "1.0 2.0 3.0 4.0 5.0" To print the items separated by something other than a space, pass a string as separator. debugPrint(1.0, 2.0, 3.0, 4.0, 5.0, separator: " ... ") // Prints "1.0 ... 2.0 ... 3.0 ... 4.0 ... 5.0" The output from each call to debugPrint(_:separator:terminator:) includes a newline by default. To print the items without a trailing newline, pass an empty string as terminator. for n in 1...5 { debugPrint(n, terminator: "") } // Prints "12345" Parameters: items: Zero or more items to print. separator: A string to print between each item. The default is a single space (" "). terminator: The string to print after all items have been printed. The default is a newline ("\n"). See Also: print(_:separator:terminator:), TextOutputStreamable, CustomStringConvertible, CustomDebugStringConvertible Declaration func debugPrint(_ items: Any..., separator: String = default, terminator: String = default) func debugPrint<Target : TextOutputStream>(_: Any..., separator: String, terminator: String, to: inout Target) Writes the textual representations of the given items most suitable for debugging into the given output stream. You can pass zero or more items to the debugPrint(_:separator:terminator:to:) function. The textual representation for each item is the same as that obtained by calling String(reflecting: item). The following example prints a closed range of integers to a string: var range = "My range: " debugPrint(1...5, to: &range) // range == "My range: CountableClosedRange(1...5)\n" To print the items separated by something other than a space, pass a string as separator. var separated = "" debugPrint(1.0, 2.0, 3.0, 4.0, 5.0, separator: " ... ", to: &separated) // separated == "1.0 ... 2.0 ... 3.0 ... 4.0 ... 5.0\n" The output from each call to debugPrint(_:separator:terminator:to:) includes a newline by default. To print the items without a trailing newline, pass an empty string as terminator. var numbers = "" for n in 1...5 { debugPrint(n, terminator: "", to: &numbers) } // numbers == "12345" Parameters: items: Zero or more items to print. separator: A string to print between each item. The default is a single space (" "). terminator: The string to print after all items have been printed. The default is a newline ("\n"). output: An output stream to receive the text representation of each item. See Also: debugPrint(_:separator:terminator:), print(_:separator:terminator:to:), TextOutputStream, TextOutputStreamable, CustomStringConvertible, CustomDebugStringConvertible Declaration func debugPrint<Target : TextOutputStream>(_ items: Any..., separator: String = default, terminator: String = default, to output: inout Target)