Using dictionaries in swift?
Example:
var ages = ["John": 28, "Doe": 32]
print(ages["John"] ?? "Unknown")
Dictionaries store associations between keys and values. The example shows a dictionary with names as keys and ages as values.
Solution:
ages["Jane"] = 25
ages["Doe"] = nil
for (name, age) in ages {
print("(name) is (age) years old")
}
We add a new key-value pair, remove a pair, and then loop through the dictionary to print each person's age.