What is a variable? This is a place in the memory where we can store some data and use it later in our program. A good example is if you want to take an action based on a user's input, then the input should be stored somewhere on the device (computer). Usually, this place is in the device's memory. To let our program know that we need such a place, we have to express that. A var statement is used.
In Swift, declaring a variable looks like this:
var text = "Hello world!"
This code creates a place in the memory, called text, where we store the text, Hello world!. Later, we can use it to carry out some meaningful actions.
An advantage of a variable is that it can be changed later to contain a different value. Here, we should be careful—Swift ...
