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Swift Language What are Tuples?


Example

Tuples group multiple values into a single compound value. The values within a tuple can be of any type and do not have to be of the same type as each other.

Tuples are created by grouping any amount of values:

let tuple = ("one", 2, "three")

// Values are read using index numbers starting at zero
print(tuple.0) // one
print(tuple.1) // 2
print(tuple.2) // three

Also individual values can be named when the tuple is defined:

let namedTuple = (first: 1, middle: "dos", last: 3)

// Values can be read with the named property
print(namedTuple.first)  // 1
print(namedTuple.middle) // dos

// And still with the index number
print(namedTuple.2)      // 3

They can also be named when being used as a variable and even have the ability to have optional values inside:

var numbers: (optionalFirst: Int?, middle: String, last: Int)?

//Later On
numbers = (nil, "dos", 3)

print(numbers.optionalFirst)// nil
print(numbers.middle)//"dos"
print(numbers.last)//3