ruby 三目运算符

Ruby运算符 (Ruby operators)

Operators are the symbols which assist compiler or interpreter to carry out certain mathematical, logical and relational tasks and produce the results. Operators are method calls with parameters.

运算符是帮助编译器或解释器执行某些数学，逻辑和关系任务并产生结果的符号。 运算符是带有参数的方法调用。

Ruby运算符的类型 (Types of Ruby operators)

Ruby supports a variety of operators but following are few of them:

Ruby支持多种运算符，但其中很少有：

1. Arithmetic operators

   算术运算符

2. Comparison operators

   比较运算符

3. Assignment operators

   赋值运算符

4. Bitwise operators

   按位运算符

1)算术运算符 (1) Arithmetic Operators)

They are mathematical methods that takes two parameters and perform arithmetic operations on them. Following is the list of arithmetic operators,

它们是采用两个参数并对它们执行算术运算的数学方法。 以下是算术运算符列表，

Example:

例：

puts "Enter first value"
num1 = gets.chomp.to_i
puts "Enter second value"
num2 = gets.chomp.to_i

add=num1+num2
puts "Sum is #{
   add}"

sub=num1-num2
puts "Difference is #{
   sub}"

mul=num1*num2
puts "Product  is #{mul}"

div=num1/num2
puts "Division is #{
   div}"

mod=num1%num2
puts "Remainder is #{mod}"

Output

输出量

Enter first value  
10  
Enter second value 
3
Sum is 13 
Difference is 7 
Product  is 30  
Division is 3
Remainder is 1 

2)比较运算符 (2) Comparison Operator)

They are a variant of binary operators which takes two operands and carry out comparison between them.

它们是二进制运算符的变体，它接受两个操作数并在它们之间进行比较。

Following is the list of comparison operators,

以下是比较运算符的列表，

Example:

例：

puts "Enter first value"
num1 = gets.chomp.to_i
puts "Enter second value"
num2 = gets.chomp.to_i

if num1==num2
	puts "Both are equal"
elsif num1>num2
	puts "num1 is greater than num2"
elsif num1<num2
	puts "num2 is greater than num1"
elsif num1!=num2
	puts "num2 is not equal to num1"
elsif num1>=num2
	puts "num1 is greater than or equals to num2"
elsif num1<=num2
	puts "num2 is greater than or equals to num1"
end

Output

输出量

Enter first value
100
Enter second value 
231
num2 is greater than num1 

3)赋值运算符 (3) Assignment operators)

Assignment operators are used to assign the value of right hand side operator to the left hand side operator.

赋值运算符用于将右侧运算符的值分配给左侧运算符。

Following is the list of assignment operators which are supported in Ruby,

以下是Ruby支持的赋值运算符的列表，

Example:

例：

puts "Enter first value"
num1 = gets.chomp.to_i
puts "Enter second value"
num2 = gets.chomp.to_i

puts "Enter choice:"
ch = gets.chomp

case ch
when 'a'
	num1+=1
	puts "#{num1}"
when 'b'
	num2-=2
	puts "#{num2}"
when 'c'
	num1*=2
	puts "#{num1}"
when 'd'
	num1**=9
	puts "#{num1}"
else
	puts "option not available."	
end

Output

输出量

Enter first value
10
Enter second value
2
Enter choice:
c
20

4)按位运算符 (4) Bitwise operators)

They are used to perform bitwise operations on binary number which includes change of particular bit.

它们用于对二进制数执行按位运算，其中包括更改特定位。

Following is the list of bitwise operators which are supported by Ruby,

以下是Ruby支持的按位运算符列表，

Example:

例：

puts "Enter first value"
num1 = gets.chomp.to_i
puts "Enter second value"
num2 = gets.chomp.to_i

a1=num1 & num2
puts "and is #{a1}"

a2=num1 | num2
puts "OR is #{a2}"

a3=num1^num2
puts "XOR is #{a3}"

a4= ~num2
puts "Complement is #{a4}"

a5=num1>>num2
puts "left shift is #{a5}"

a6=num1<<num2
puts "Right shift is #{a6}"

Output

输出量

Enter first value
3
Enter second value 
5
and is 1 
OR is 7
XOR is 6 
Complement is -6 
left shift is 0
Right shift is 96

翻译自: https://www.includehelp.com/ruby/operators.aspx

ruby 三目运算符