They also enable us to much more freely use unescaped quotation marks within them, since they are defined by a set of three quotation marks, making the bounds of the literal much less likely to become ambiguous. In Swift, a series of characters are represented by String type. “Type inference-powered serialization in Swift”. That’s all for the string literals! With Swift 4 following is the way to define a multiline string literals using triple quotes: let multiLineString = """ Line 1 Line 2 goes here Line 3 goes here """ Swift 4 compiler adds a new line by default at the end of each line. Will that also be included in the string literal or not? let string: String = "Hello, I am a string." It’ll most likely come down to any given developer’s previous experience with regular expressions, whether or not they prefer them over implementing more custom string parsing algorithms, directly in Swift. There are an almost endless number of ways to create a String, using literals, conversions from other Swift types, Unicode, etc. But don’t go anywhere we are not done yet. This week, let’s focus on string literals in particular, by taking a take a look at the many different ways that they can be used and how we — through Swift’s highly protocol-oriented design — are able to customize the way literals are interpreted, which lets us do some really interesting things. By delegating much of how literals are interpreted and handled to implementors of protocols, rather than hard-coding those behaviors in the compiler itself, we as third-party developers are able to heavily customize the way literals are handled — while still keeping the defaults as simple as they can be. In swift string interpolation means creating new string value from a mix of numbers, constants, variables, literals and expressions by including their values inside a string literal. In addition to the String initialisation syntax we saw earlier, the String type also has one more initialisation method I wanted to mention – that of using an array of Character values to initialise the String. 1 Delimiter lines are not included in the string literals operations. By defining regular expressions using raw strings, no escaping is needed, giving us expressions that are as readable as they get: Even with the above improvements, it’s questionable how easy to read (and debug) regular expressions are — especially when used in the context of a highly type-safe language like Swift. There are certain characters which has special effects when included in the string literals. A string is an ordered collection of characters, such as "We Swift" or "eat, sleep, code, repeat! You can. But what to do if the multiline string literals itself have backslash in the string content? What happen if we have multiple special characters in a string literals, but we just want to remove the effect for few of them not all? What do you think about string literals and the new APIs introduced in Swift 5? A string literal is a sequence of characters designated with a starting double quote (") and a closing double quote ("). Let see the examples how to achieve this. // If we want to break a multiline literal into separate Swift Constants - Constants refer to fixed values in the Swift program which will not alter during the execution of the program. You can include predefined String values within your code as string literals. But don’t you think a quote looks good in single line. It’s simple, just introduce blank line in the source, it will replicate in the string value also. 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