Swift Arithmetic Operators Tutorial 📝

Welcome to the Swift Arithmetic Operators tutorial! In this lesson, we'll explore the essential arithmetic operators Swift offers. Let's dive in!

Understanding Arithmetic Operators 💡

Arithmetic operators are symbols that Swift uses to perform mathematical operations on values. We'll learn about five types of arithmetic operators in Swift:

Addition (+)
Subtraction (-)
Multiplication (*)
Division (/)
Modulus (% - Remainder)

Let's see some examples of each operator.

Addition ( + ) 🎯

Addition is used to combine two numbers.

swift

var sum = 5 + 3
print("The sum is \(sum)") // Output: The sum is 8

Subtraction ( - ) 🎯

Subtraction is used to find the difference between two numbers.

swift

var difference = 10 - 3
print("The difference is \(difference)") // Output: The difference is 7

Multiplication ( * ) 🎯

Multiplication is used to find the product of two numbers.

swift

var product = 5 * 3
print("The product is \(product)") // Output: The product is 15

Division ( / ) 🎯

Division is used to divide one number by another.

swift

var quotient = 12 / 3
print("The quotient is \(quotient)") // Output: The quotient is 4

Modulus ( % ) 🎯

Modulus operator gives the remainder after division.

swift

var remainder = 12 % 3
print("The remainder is \(remainder)") // Output: The remainder is 0 (since 12 is divisible by 3)

Arithmetic Operator Precedence 📝

When multiple operators are used in an expression, Swift follows a specific order to evaluate them. This order is called precedence. Let's take a look at a complex example:

swift

var result = 5 + 3 * 2
print("The result is \(result)") // Output: The result is 11 (first, Swift multiplies 3 * 2, then adds 5)

📝 Note: To change the order of operations, use parentheses ().

swift

var result = (5 + 3) * 2
print("The result is \(result)") // Output: The result is 20 (first, Swift adds 5 + 3, then multiplies by 2)

Operator Associativity 📝

Operator associativity determines how multiple operators of the same type are grouped in expressions. Swift follows the following rules for arithmetic operators:

Addition (+) and subtraction (-) are left-associative.
Multiplication (*) and division (/) are left-associative.

For example:

swift

var result = 5 + 3 + 2
print("The result is \(result)") // Output: The result is 10 (first, Swift adds 5 + 3, then adds 2)

📝 Note: You can use parentheses to explicitly group terms, like so:

swift

var result = (5 + 3) + 2
print("The result is \(result)") // Output: The result is 10 (first, Swift adds 5 + 3, then adds 2)

🎯 Practice time! Let's solve a few problems with arithmetic operators.

That's all for now! In the next lesson, we'll explore comparison operators in Swift. Keep practicing, and happy coding! 🎉