Explain the concept of variables, constants, and data types in Swift.

In Swift, variables, constants, and data types are fundamental concepts used for storing and manipulating data within a program. Let's delve into each concept and understand how they work in Swift: 1. Variables: Variables in Swift are used to store and manage mutable data. They hold values that can change during the execution of a program. You can declare a variable using the `var` keyword, followed by the variable name and its optional type annotation. For example: ``` swift`var age: Int = 25` ``` In this example, `age` is a variable of type `Int` (integer) that holds the value `25`. You can modify the value of a variable at any point in your code using the assignment operator (`=`). For instance: ``` swift`age = 30` ``` Now, the `age` variable holds the value `30`. Variables provide flexibility when you need to store data that can change over time. 2. Constants: Constants, as the name suggests, hold values that ....