Print in Swift 3

问题

i would like to know what's the different between these two way to print the object in Swift. The result seems identical.

var myName : String = "yohoo" 
print ("My name is \(myName).")

print ("My name is ", myName, ".")

回答1:

There is almost no functional difference, the comma simply inputs a space either before or after the string.

let name = "John"

// both print "Hello John"
print("Hello", name)
print("Hello \(name)")

回答2:

You can use the \(variable) syntax to create interpolated strings, which are then printed just as you input them. However, the print(var1,var2) syntax has some "facilities":

• It automatically adds a space in between each two variables, and that is called separator

• You can customise your separator based on the context, for example:

  var hello = "Hello"
  var world = "World!"
  print(hello,world,separator: "|")    // prints "Hello|World!"
  print(hello,world,separator: "\\//")    // prints "Hello\\//World!"
  

来源：https://stackoverflow.com/questions/43963356/print-in-swift-3