How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Swift

How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Swift ?

Answer

To get the size (number of key-value pairs) of a dictionary in Swift, you can use the `count` property. This property returns the number of key-value pairs in the dictionary.

✐ Examples

1 Getting the Size of a Dictionary Using the `count` Property

We can get the size of a dictionary in Swift using the `count` property. This example demonstrates how to declare and initialize a dictionary, use the `count` property to get the number of key-value pairs, and print the size.

For example,

We start by declaring and initializing a dictionary named myDictionary with integer keys and string values.
We use the `count` property to get the number of key-value pairs in the dictionary.
We print the size of the dictionary.

Swift Program

var myDictionary: [Int: String] = [
    1: "One",
    2: "Two",
    3: "Three"
]

// Get the size of the dictionary using the count property
let size = myDictionary.count

// Print the size of the dictionary
print("The size of the dictionary is \(size).")

Output

The size of the dictionary is 3.

2 Getting the Size of an Empty Dictionary

We can get the size of an empty dictionary in Swift using the `count` property. This example demonstrates how to declare and initialize an empty dictionary, use the `count` property to get the number of key-value pairs, and print the size.

For example,

We start by declaring and initializing an empty dictionary named myDictionary.
We use the `count` property to get the number of key-value pairs in the dictionary.
We print the size of the dictionary.

Swift Program

var myDictionary: [Int: String] = [:]

// Get the size of the dictionary using the count property
let size = myDictionary.count

// Print the size of the dictionary
print("The size of the dictionary is \(size).")

Output

The size of the dictionary is 0.

Summary

In this tutorial, we learned How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Swift language with well detailed examples.

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How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Swift