Swift - Variables and Constants
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We will cover Data Types in this tutorial :-
In Swift, variables and constants are used to store and reference values. Here's an overview of how to declare and use variables (var) and constants (let)
/*
In Swift, variables and constants are used to store and reference values. Here's an overview of how to declare and use variables (var) and constants (let):
Variables (var):
A variable is a mutable storage location that can hold a value of a particular type. You can change the value of a variable after it's initially set.
*/
var itemsInBasket: Int = 10
itemsInBasket = 11
print("itemsInBasket=", itemsInBasket)
//In the example above, itemsInBasket is declared as a variable of type Int and is initially set to the value 10. Later, its value is changed to 11.
/*
Constants (let):
A constant is an immutable storage location, meaning its value cannot be changed after it's initially set. Constants are declared using the let keyword.*/
let myLearning: String = "Learning Swift!"
print("myLearning=", myLearning)
/*
Type Inference:
Swift has a powerful type inference system, which means you often don't have to explicitly mention the type of a variable or constant. The compiler can often deduce it based on the initial value you provide.
*/
var myVariableWithoutExplicitType = 42 // Swift infers the type as Int
let myConstantWithoutExplicitType = "Hello, Type Inference!" // Swift infers the type as String
/*
Naming Conventions:
When naming variables and constants in Swift, it's common to use camelCase. For example:
*/
var piValue: Double = 3.14
🛠️ Prerequisites:
Basic knowledge of Swift programming
Xcode installed on your machine
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