In Swift, you can use the contains method to check if a hash includes a specific key. Here are some examples:
// Create a dictionary
var car: [String: String] = ["make": "Toyota", "model": "Camry", "year": "2020"]
// Check if the dictionary contains a key
if car.keys.contains("make") {
print("The car dictionary includes the key 'make'")
} else {
print("The car dictionary does not include the key 'make'")
}
// Create a dictionary
var student: [Int: String] = [1: "John", 2: "Jane", 3: "Jim"]
// Check if the dictionary contains a key
if student.keys.contains(4) {
print("The student dictionary includes the key 4")
} else {
print("The student dictionary does not include the key 4")
}
In these examples, we create a dictionary and use the contains method to check if the dictionary includes a specific key. The keys property is used to get an array of all the keys in the dictionary, and then we call the contains method on that array and pass in the key we want to check. If the key is found in the dictionary, the contains method returns true, and we print a message indicating that the key was found. Otherwise, we print a message indicating that the key was not found.