How to Check if a Dictionary is Empty in Swift

How to Check if a Dictionary is Empty in Swift ?

Answer

To check if a dictionary is empty in Swift, you can use the `isEmpty` property. An empty dictionary has an `isEmpty` property that returns `true`.


✐ Examples

1 Checking if a Dictionary is Empty Using the `isEmpty` Property

We can check if a dictionary is empty in Swift using the `isEmpty` property. This example demonstrates how to check if a dictionary is empty and print a message based on the result.

For example,

  1. We start by declaring and initializing a dictionary named myDictionary.
  2. We use the `isEmpty` property to check if the dictionary is empty.
  3. We print a message based on whether the dictionary is empty or not.

Swift Program

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

// Check if the dictionary is empty using the isEmpty property
if myDictionary.isEmpty {
    print("The dictionary is empty.")
} else {
    print("The dictionary is not empty.")
}

Output

The dictionary is empty.

2 Checking if a Non-Empty Dictionary is Empty Using the `isEmpty` Property

We can check if a non-empty dictionary is empty in Swift using the `isEmpty` property. This example demonstrates how to check if a dictionary with key-value pairs is empty and print a message based on the result.

For example,

  1. We start by declaring and initializing a dictionary named myDictionary with some key-value pairs.
  2. We use the `isEmpty` property to check if the dictionary is empty.
  3. We print a message based on whether the dictionary is empty or not.

Swift Program

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

// Check if the dictionary is empty using the isEmpty property
if myDictionary.isEmpty {
    print("The dictionary is empty.")
} else {
    print("The dictionary is not empty.")
}

Output

The dictionary is not empty.

Summary

In this tutorial, we learned How to Check if a Dictionary is Empty in Swift language with well detailed examples.


More Swift Dictionaries Tutorials

  1. How to create an Empty Dictionary in Swift ?
  2. How to create a Dictionary with Initial Key-Value Pairs in Swift ?
  3. How to Print a Dictionary in Swift ?
  4. How to Add a Key-Value Pair to a Dictionary in Swift ?
  5. How to Set a Default Value for a Key in a Dictionary in Swift ?
  6. How to Update the Value for a Key in a Dictionary in Swift ?
  7. How to Check if a Dictionary is Empty in Swift ?
  8. How to Check if a Key Exists in a Dictionary in Swift ?
  9. How to Check if a Value Exists in a Dictionary in Swift ?
  10. How to Get the Value Associated with a Key in a Dictionary in Swift ?
  11. How to Remove a Key-Value Pair from a Dictionary in Swift ?
  12. How to Remove Key-Value Pairs from a Dictionary Based on Values in Swift ?
  13. How to Clear all Key-Value Pairs from a Dictionary in Swift ?
  14. How to Iterate over Keys in a Dictionary in Swift ?
  15. How to Iterate over Values in a Dictionary in Swift ?
  16. How to Iterate over Entries (Key-Value Pairs) in a Dictionary in Swift ?
  17. How to Get the Size (Number of Key-Value Pairs) of a Dictionary in Swift ?
  18. How to Convert a Dictionary to an Array of Keys in Swift ?
  19. How to Convert a Dictionary to an Array of Values in Swift ?
  20. How to Convert a Dictionary to an Array of Key-Value Pairs in Swift ?
  21. How to Merge Two Dictionaries in Swift ?
  22. How to Clone a Dictionary in Swift ?
  23. How to Check if Two Dictionaries are Equal in Swift ?
  24. How to Sort a Dictionary by Keys in Swift ?
  25. How to Sort a Dictionary by Values in Swift ?
  26. How to Filter a Dictionary Based on Keys in Swift ?
  27. How to Filter a Dictionary Based on Values in Swift ?
  28. How to Reduce Values in a Dictionary to a Single Value in Swift ?
  29. How to Convert an Array of Key-Value Pairs to a Dictionary in Swift ?
  30. How to Convert a Dictionary to a JSON String in Swift ?
  31. How to Convert a JSON String to a Dictionary in Swift ?
  32. How to Swap Keys and Values in a Dictionary in Swift ?
  33. How to Create a Dictionary of Dictionaries in Swift ?
  34. How to Iterate Over a Dictionary of Dictionaries in Swift ?