Swift's use of ____ ensures that the comparison of strings accounts for combining characters. code example

Example 1: print string sqift

var str1 = "Hello, world"
print(str1)

Example 2: declare empty string in swift

// Create a literal empty string
var emptyString = ""

// Create an optional string
var emptyVariable: String?  // This allows this variable to have a null value, or nil in swift