Swift Operators

Introduction to Swift Operators

An operator is a symbol that helps to perform various logical and mathematical computations. Swift supports most of the standard C operators.

They are classified into three types:

1. Unary operators: These operators operate on a single operand only. For example, increment operator.
2. Binary operators: These operators operate on two operands. For example, the addition operator.
3. Ternary operators: These operators operate on three operands. For example, a ? b: c.

Swift Operators

Different operators present in swift are as follows:

• Arithmetic Operator
• Logical Operator
• Assignment Operator
• Comparison Operator
• Bitwise Operator
• Range Operator
• Miscellaneous Operator

Now let us see each type of operator in detail:

1. Swift Arithmetic Operators

These operators are used to perform mathematical calculations on the operands.

Operator	Symbol	Explanation	Format
Addition	+	Adds given two operands	x + y
Subtraction	–	Subtracts the right operand from the left one.	x – y
Multiplication	*	Multiplies two operands	x * y
Division	/	Divides the numerator by the denominator	x / y
Modulus	%	Returns the remainder after performing division	x % y

Example:

print(5  +  2)
print(5  -  2)
print(5  *  2)
print(5  /  2)
print(5  %  2)

Output:

7

3

10

2

1

2. Swift Logical Operator

These operators return Boolean values taking Boolean values as input.

Operator	Symbol	Explanation	Format
Logical AND	&&	Returns true if all expressions are true; else return false	x && y
Logical OR	||	Returns false if all expressions are false; else return true	x || y
Logical NOT	!	Inverses the input, i.e. return true for false and vice versa	!x

Example:

print(true  &&  true)
print(true  &&  false)
print(true  ||  false)
print(false  ||  false)
print(! false)

Output:

true

false

true

false

true

3. Swift Assignment Operator

These operators are used to assign values to a variable.

Operator	Symbol	Explanation	Format
Assignment	=	Assigns a value of right operand to the left operand	x = y
Addition	+=	Adds two operands and then assigns a value to the left operand	x += y
Subtraction	-=	Subtracts right operand from left operand and then assigns the value to left operand	x -= y
Multiplication	*=	Multiplies two operands and then assigns a value to the left operand	x *= y
Division	/=	Divides the numerator by denominator and then assigns a value to the left operand	x /= y
Modulus	%=	Returns remainder after division and then assigns a value to left operand	x %= y
Bitwise AND	&=	Compares the binary value of two operands, return 1 if both operands are 1 else return 0 and assign a value to the left operand	x &= y
Bitwise OR	|=	Compares the binary value of two operands, return 0 if both operands are 0 else return 1 and assign the value to the left operand	x |= y
Bitwise XOR	^=	Compares the binary value of two operands, return 0 if both operands are same else return 1 and assign a value to the left operand	x ^= y
Left Shift	<<=	Shifts the bits towards the left and assign the result to the left operand	x <<= 2
Right Shift	>>=	Shifts the bits towards the right and assign the result to the left operand	x >>= 2

Example:

let a = 5
print (a)
var x = 6
print(x += 3)
print(x -= 3)
print(x *= 3)
print(x /= 3)
print(x %= 3)
print(x &= 3)
print(x |= 3)
print(x ^= 3)
print(x <<= 2)
print(x >>= 2)

Output:

5

9

3

18

2

0

2

7

5

8

1

4. Swift Comparison Operator

These operators help to compare two values and return Boolean values as output.

Operator	Symbol	Explanation	Format
Equal to	==	Returns true if both operands are equal else return false	x == y
Not Equal to	!=	Returns true if both operands are not equal; else return false	x != y
Greater than	>	Returns true if the left operand is greater than right; else return false	x > y
Less than	<	Returns true if the left operand is smaller than right; else return false	x < y
Greater than or equal to	>=	Returns true if the left operand is greater than or equal to the right; else return false	x >= y
Less than or equal to	<=	Returns true if the left operand is smaller than or equal to the right; else return false	x <= y

Example:

print(5  ==  2)
print(5  !=  2)
print(5  >  2)
print(5  <  2)
print (5 >= 5)
print (5  <=  2)

Output:

false

true

true

true

true

false

5. Swift Bitwise Operator

Operator	Symbol	Explanation	Format
Binary AND	&	Check the operands bitwise and return 1 if both bits are 1; else return 0	x & y
Binary OR	|	Check the operands bitwise and return 0 if both bits are 0; else return 1	x | y
Binary XOR	^	Check the operands bitwise and return 0 if both bits are the same; else return 1	x ^ y
Binary NOT	~	Returns ones complement, i.e. changes 1 to 0 and vice versa	~x
Binary Left Shift	<<	Bits of the left operand is shifted left side by the number of bits mentioned by the right operand	x << 4
Binary Right Shift	>>	Bits of the left operand is shifted right side by the number of bits mentioned by the right operand	x >> 4

Example:

var a = 8
var b = 7
print(a & b)
print(a | b)
print(a ^ b)
print(~ b)
print(a << 2)
print(a >> 2)

Output:

0

15

15

8

0

2

6. Swift Range Operators

These operators are used as shortcuts to express the range of values.

Operator	Symbol	Explanation	Format
Closed Range	(a…b)	It defines a range from a to b, both included	1…5
Half – Open Range	(a..<b)	It defines the range from a to b; an included while b excluded	1..<5
One-sided Range	a… ..a	It defines the range from a to end of elements or from start to a	1… …2

Example:

for i in 1...4 {
print(i)}
for j in 1. . <4 {
print(j) }
let range = ..<4
print(range.contains(2))

Output:

1

2

3

4

1

2

3

true

7. Swift Miscellaneous Operators

Operator	Symbol	Explanation	Format
Unary Plus	+	This toggles the sign of the numeric value to plus	+5
Unary Minus	–	This toggles the sign of the numeric value to minus.	-6
Ternary condition	? :	Used to check a condition and then give output accordingly	Condition? a: b

Example:

var a = -3
print(+a)
print(-a)
let b = (6==6) ? “True”: “false”
print(b)

Output:

-3

3

True

Recommended Articles

This has been a guide to Swift Operator. Here we have discussed the various type of Swift operators with examples. You can also go through our other suggested articles to learn more –

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