Operators:
An Operator a special symbol that tells the compiler to perform
mathematical or logical operations.
Assignment Operator:
The assignment operator (a=b) initailizes or updates the vlaue
of a with a vlue of b.
let b = 12
var a = 10
a = b // a is now 12
Arithmetic Operators :
Swift supports 4 arithmetic operators.
Addition
Subtraction
Multiplication
Division
Remainder Operator :
9 % 4 = 1
5 % 1.5 = 0.5
Comparison Operator :
Equal to (a == b)
Not equal to (a != b)
Greater than (a > b)
less than (a < b) .................etc
Ternary Conditional Operator :
Ternary conditional operator is a special operator with 3 parts.
question ? answer 1 : answer 2
if question {
answer 1
} else {
answer2
}
if question is true, it evaluates answer 1, otherwise, it
evaluates answer 2.
Range Operators:
Closed Range Operator:
The closed range operator (a...b) defines a range from a to
b,incluses vlues a and b.
ex:
for index in 1...6 {
print("\(index) times 6 is \(index * 5)")
}
// 1 times 5 is 5
// 2 times 5 is 10
// 3 times 5 is 15
// 4 times 5 is 20
// 5 times 5 is 25
Half- Open range operator :
The half open range operator (a..<b) defines a
range from a to b, but does not include b.
let countrynames = ["India","Malaysia","USA","Singapore","Thailand"]
let count = countrynames.count
for i in 0..<count {
print("Country \(i+1) is called \(countrynames[i])")
}
// Country 1 is called India
// Country 2 is called Malaysia
.
//// Country 5 is called Thailand
Logical Operators :
Logical operators are similar to c, java languages.
Logical NOT (!a)
Logical AND (a && b)
Logical OR (a || b)
