Assignment Operators in Swift
Assignment Operators are used to assign value to a variable. They can perform basic mathematical arithmetic operators like addition, subtraction, multiplication, etc., and then assign the result back to the left operand variable.
The following table lists out all the arithmetic operators in Swift.
| OperatorSymbol | Name | Example | Description |
|---|---|---|---|
= | Assignment | x = 2 | Assigns the value of 2 to x. |
+= | Addition Assignment | x += 2 | Adds the value of 2 to that of x, and assigns the result to x. |
-= | Subtraction Assignment | x -= 2 | Subtracts the value of 2 from that of x, and assigns the result to x. |
*= | Multiplication Assignment | x *= 2 | Multiplies the value of 2 to that of x, and assigns the result to x. |
/= | Division Assignment | x /= 2 | Finds the quotient in the division of x by 2, and assigns the quotient to x. |
%= | Modulus Assignment | x %= 2 | Finds the remainder in the division of x by 2, and assigns the remainder to x. |
Assignment Operators
1. Assignment
Assignment operator takes two operands: x and y, and assigns the right operand y to left operand x.
main.swift
var x: Int
x = 5
print("x is \(x)") Output
x is 5
2. Addition Assignment
Addition assignment operator takes two operands as inputs: x and y, and assigns the sum of x and y to x.
main.swift
var x = 5
var y = 2
x += y
print("x is \(x)") Output
x is 7
3. Subtraction Assignment
Subtraction assignment operator takes two operands as inputs: x and y, and assigns the difference x – y to x.
main.swift
var x = 5
var y = 2
x -= y
print("x is \(x)") Output
x is 3
4. Multiplication Assignment
Multiplication assignment operator takes two operands as inputs: x and y, and assigns the product of x and y to x.
main.swift
var x = 5
var y = 2
x *= y
print("x is \(x)") Output
x is 10
5. Division Assignment
Division assignment operator takes two operands as inputs: x and y, and assigns the quotient in the division of x by y to x.
main.swift
var x = 5
var y = 2
x /= y
print("x is \(x)") Output
x is 2
In the division of 5/2, 2 is the quotient and 1 is the remainder.
5. Modulus Division Assignment
Modulus Division assignment operator takes two operands as inputs: x and y, and assigns the remainder in the division of x by y to x.
main.swift
var x = 5
var y = 2
x %= y
print("x is \(x)") Output
x is 1
In the division of 5/2, 2 is the quotient and 1 is the remainder.
Conclusion
In this Swift Tutorial, we learned about Assignment Operators in Swift language, different Assignment operators: Assignment, Addition Assignment, Subtraction Assignment, Multiplication Assignment, Division Assignment, and Modulo Assignment, with examples.