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Swift program to remove the first element from a Set collection

Here, we are going to learn how to remove the first element from a Set collection in Swift programming language?
Last Updated : June 26, 2021

Problem Solution

Here, we will create a set of integer elements using the Set collection. Then we will remove the first item from the created set collection using the removeFirst() function.

Program/Source Code

The source code to remove the first element from a Set collection is given below. The given program is compiled and executed successfully.

// Swift program to remove the first element 
// from a Set collection

import Swift

var IntegerSet:Set<Int> = [10, 20]

IntegerSet.insert(30)
IntegerSet.insert(40)
IntegerSet.insert(50)
IntegerSet.insert(60)

print("Set elements:")
for num in IntegerSet {
    print(num)
}

let removedItem = IntegerSet.removeFirst()
print("Removed item: ",removedItem)

print("Updated Set elements:")
for num in IntegerSet {
    print(num)
}

Output

Set elements:
50
60
30
10
40
20
Removed item:  50
Updated Set elements:
60
30
10
40
20

...Program finished with exit code 0
Press ENTER to exit console.

Explanation

In the above program, we imported a package Swift to use the print() function using the below statement,

import Swift

Here, we created an IntegerSet set of integer elements. Then we removed the first item from the set using the removeFirst() function. The removeFirst() function returns the removed item into removedItem. After that, we printed the updated set and removed the item on the console screen.

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