Swift Dictionary isEmpty

var languages = ["Swift": 2014, "C": 1972, "Java": 1995]

// check if leanguages is empty or not
var result = languages.isEmpty

print(result)

// Output: false

isEmpty Syntax

The syntax of the dictionary isEmpty property is:

dictionary.isEmpty 

Here, dictionary is an object of the Dictionary class.

isEmpty Return Values

The isEmpty property returns:

• true - if the dictionary does not contain any elements
• false - if the dictionary contains some elements

Example 1: Swift dictionary isEmpty

var names = ["Alcaraz": 2003, "Sinner": 2000, "Nadal": 1985]

// check if names is empty or not
print(names.isEmpty)  

var employees = [String: Int]()

// check if employees is empty or not
print(employees.isEmpty)

Output

false
true

In the above example, since

• names contain three key/value pairs, the property returns false.
• employees is an empty dictionary, the property returns true.

Example 2: Using isEmpty With if...else

var employees = ["Ranjy": 50000, "Sabby": 100000]

// false because names contains three key/value pairs
if (employees.isEmpty) {

  print( "Dictionary is empty")
}

else {

  print("Elements:", employees)
}

Output

Elements: ["Ranjy": 50000, "Sabby": 100000]

Here, the employees dictionary is not empty, so the if block is skipped and the else block is executed.