Add New Element in a Set in Swift

This tutorial will discuss how to write swift program to add a new element in the set.

Set is a primary collection type in Swift. It is an unordered collection which stores unique values of same data type. You are not allowed to store different type of values in the same set. A set can be mutable or immutable.

To add a new element in the set Swift provide the following functions ?

• insert()

• update()

Below is a demonstration of the same ?

Input

Suppose our given input is ?

MySet = [23, 45, 1, 46, 2]
Insert = 98

Output

The desired output would be ?

New Set = [23, 45, 1, 46, 2, 98]

Method 1 - Using insert() Function

To add a new element in the set Swift provide an in-built function named insert(). The insert() function is used to add new element in the specified set. This function does not return any value it just update the given set.

Syntax

Following is the syntax ?

SetName.insert(NewItem)

Algorithm

Following is the algorithm ?

• Step 1? Create a set with values.

• Step 2? Insert a new element using insert() function.

setElement.insert(100)

• Step 3? Print the output

Example

The following program shows how to add new element in the set.

import Foundation
import Glibc

// Creating a set of integer type
var setElement : Set = [34, 67, 89, 23, 12, 98, 1, 98, 13]

print("Original Set:", setElement)

// Insert new element
setElement.insert(100)

print("New Set:", setElement)

Output

Original Set: [12, 98, 13, 67, 23, 89, 1, 34]
New Set: [12, 100, 98, 13, 67, 23, 89, 1, 34]

Here, in the above code, we have a set of integer type named setElement. Now we insert a new element that is 100 into it using insert() function ?

setElement.insert(100)

Hence the updated set is: [12, 100, 98, 13, 67, 23, 89, 1, 34].

Method 2 - Using update() Function

To add a new element in the set Swift provide another in-built function named update(). The update() function is used to add the given element in the specified set. This function does not return any value it just update the given set.

Syntax

Following is the syntax ?

SetName.update(with: myItem)

Algorithm

Following is the algorithm ?

• Step 1? Create a set with values.

• Step 2? Insert a new element using update() function.

setNames.update(with: "Robin")

• Step 3? Print the output

Example

The following program shows how to add new element in the set.

import Foundation
import Glibc

// Creating a set of string type
var setNames : Set = ["Hen", "Owl", "Duck", "Egale", "Bee"]

print("Original Set:", setNames)

// Insert new element
setNames.update(with: "Robin")

print("Updated Set:", setNames)

Output

Original Set: ["Duck", "Egale", "Bee", "Hen", "Owl"]
Updated Set: ["Duck", "Robin", "Eagle", "Bee", "Hen", "Owl"]

Here, in the above code, we have a set of String type named setNames. Now we insert a new element that is "Robin" into it using update() function ?

setNames.update(with: "Robin")

Hence the updated set is: ["Duck", "Robin", "Eagle", "Bee", "Hen", "Owl"].