Swift Set isSubset()

var A: Set = [1, 2, 3]
var B: Set = [1, 2, 3, 4, 5]

// check if A is subset of B or not
print(A.isSubset(of: B))

// Output: true

isSubset() Syntax

The syntax of the set isSubset() method is:

set.isSubset(otherSet)

Here, set is an object of the Set class.

isSubset() Parameters

The isSubset() method takes a single parameter:

• otherSet - The set of elements.

isSubset() Return Value

• The isSubset() method returns true if set is a subset of otherSet. If not, it returns false.

Example: Swift Set isSubset()

var employees: Set = ["Sabby", "Cathy", "Kenny", "Sammy", "Lanny"]
var developers: Set = ["Sabby", "Lanny"]
var designers: Set = ["Cathy", "Patty"]

// check if developer is subset of employees
print(developers.isSubset(of: employees))

// check if developer is subset of employees
print(designers.isSubset(of: employees))

Output

true
false

Here, we have used the isSubset() method to check if one set is a subset of another or not.

Since

• developers is subset of employees, the method returns true.
• designers is not a subset of employees, the method returns false.