FunctionSwift

debugPrint(_:separator:terminator:)

Writes the textual representations of the given items most suitable for debugging into the standard output.

func debugPrint(_ items: Any..., separator: String = " ", terminator: String = "\n")

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").

Overview

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 "ClosedRange(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"