Swift operator

An operator is a symbol that tells the compiler to perform a mathematical or logical operation.

Swift provides the following operators:

• Arithmetic operator
• Comparison operator
• The logical operator
• Bit operator
• The assignment operator
• The interval operator
• Other operators

In this section, we'll cover arithmetic operators, relationship operators, logical operators, bit operators, assignment operators, and other operators in more detail.

Arithmetic operator

The following table lists the arithmetic operators supported by the Swift language, where variable A is 10 and variable B is 20:

Instance

Here are a simple examples of arithmetic:

import Cocoa

var A = 10
var B = 20

print("A + B 结果为：\(A + B)")
print("A - B 结果为：\(A - B)")
print("A * B 结果为：\(A * B)")
print("B / A 结果为：\(B / A)")
A++
print("A++ 后 A 的值为 \(A)")
B--
print("B-- 后 B 的值为 \(B)")

The above procedures are performed as follows:

A + B 结果为：30
A - B 结果为：-10
A * B 结果为：200
B / A 结果为：2
A++ 后 A 的值为 11
B-- 后 B 的值为 19

Comparison operator

The following table lists the comparison operators supported by the Swift language, where variable A is 10 and variable B is 20:

Instance

Here are a simple examples of comparison operations:

import Cocoa

var A = 10
var B = 20

print("A == B 结果为：\(A == B)")
print("A != B 结果为：\(A != B)")
print("A > B 结果为：\(A > B)")
print("A < B 结果为：\(A < B)")
print("A >= B 结果为：\(A >= B)")
print("A <= B 结果为：\(A <= B)")

The above procedures are performed as follows:

A == B 结果为：false
A != B 结果为：true
A > B 结果为：false
A < B 结果为：true
A >= B 结果为：false
A <= B 结果为：true

The logical operator

The following table lists the logical operators supported by the Swift language, where the variable A is true and the variable B is false:

Here are a simple examples of logical operations:

import Cocoa

var A = true
var B = false

print("A && B 结果为：\(A && B)")
print("A || B 结果为：\(A || B)")
print("!A 结果为：\(!A)")
print("!B 结果为：\(!B)")

The above procedures are performed as follows:

A && B 结果为：false
A || B 结果为：true
!A 结果为：false
!B 结果为：true

Bit operator

Bit operators are used to operate on binary bits, | ,

If you specify A - 60; a nd B s 13; The binary for the two variables is:

A = 0011 1100

B = 0000 1101

To perform bit operations:

Operator	Describe	Graphic	Instance
&	By bit with. Operates on two numbers by bit and operator, and then returns a new number, each of which requires the same bit of two input numbers to be 1.		The result is 12 and the binary is 0000 1100
|	By bit or. Compare two numbers by bit or operator| and return a new number, each of which sets 1 if neither input number has the same bit 0 (i.e. either one is 1, or both are 1).		(A | B) The result is 61 and the binary is 0011 1101
^	By bit or. Compare two numbers by bit difference or operator, and then return a number, each bit of which is set to 1 if the same bit of the two input numbers is different, and if the same is set to 0.		The result is 49 and the binary is 0011 0001
~	The bit-by-bit counteroperation operator is reversed for each bit of an operatic number.		The result is -61, with binary of 1100 0011 in 2's couple form.