Operators in Swift can be:
Unary, which requires only one operand or input.(e.g. -a)
Binary, which requires two operands or inputs. (e.g. a+b)
Ternary, which requires three operands. (e.g. ?:).
Swift Assignment Operator
The assignment operator initializes or updates a variable.
var name = "John Doe"
name = "Dave Mathias"
Swift Comparison operators
The comparison operator returns a Boolean true if the statement is true or a Boolean false if the statement is not true.
Swift Arithmetic operators
The arithmetic operators perform the four basic mathematical operations: add, subtract, multiply, divide.
Swift Remainder operator
The remainder operator calculates the remainder if the first operand is divided by the second operand.
var num1 = 20, num2 = 3
num1 % num2 // remainder is 2
Swift Increment, decrement and Compound operators
The increment and decrement operators are shortcuts to increment or decrement a variable by 1.
The compound assignment operators combine an arithmetic operator with an assignment operator.
Swift Logical operators
Logical AND operator returns true if both operands are true, otherwise it returns false.
The logical OR operator returns true if either of the operands is true.
The logical NOT operator inverts a Boolean value.
var bool1 = true, bool2 = false
bool1 && bool2 // false
bool1 || bool2 // true
!bool1 // false
Swift Ternary operator
Ternary operator can be used as a short form for if else conditions.
The ternary conditional operator assigns a value to a variable, based on the condition in first parameter.
boolean expression ? value if true : value if false
var x = 10
var msg = x > 0 ? "positive" : "negative or zero"
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