Operators in Ruby

There are a number of operators in ruby. Operators are those basic elements which do some operations on data like addition, subtraction, etc.

Arithmetic Operators

These are mathematics operators.

OperatorsDescriptionExample
+ addition 4 + 5 = 9
- subtraction 12 - 34 = -22
* Multiplication2*3 = 6
/ Division, if both number are integers then integer is returned 3/2=1 but 3.0/2 = 1.5
% modulus, return reminder after division 5/2 = 1, 15/4 = 3
** power 2**3 = 8 (2*2*2 = 8)

Comparison Operators

These operators compare condition and return true or false.

OperatorsDescriptionExample
== return true if both are equal otherwise false 2==2 is true
!= return true if both sides are not equal 2!=2 is false
> return true if left side is greater 4>2 is true
< return true if right side is greater 2<4 is true
>= return true if right side is grater or equal 4>=4,5>=4, both true
<= return true if left side is grater or equal 4<=4,3<=4, both true
<=> return 0 if both equal, 1 if left greater and -1 if right greater 4<=>3 returns 1
=== return true if right is in the range of left (1...20) === 9 returns true.

Assignment Operators:

These operators assign the value to any variable after doing operation.

OperatorDescriptionExample
= assign value a = 12
+= add right side to left side a+=b same as a = a+b
-= subtract right side from left side a-=b same as a = a-b
*= multiply right side to left side a*=b same as a = a*b
/= divide right side by left side a/=b same as a = a/b
%= divide right side by left side and assign reminder to right side a%=b same as a = a%b
**= raise left side index as right side a**=b same as a = a**b

Parallel Assignment:

In ruby, we can assign values to multiple variables in same line.

  1. # variables as well as values are saperated by comma.
  2. name, age = 'harish',20
  3. print "name is #{name} and age is #{age}"

Output:

  1. name is harish and age is 20

Bitwise Operators:

If you are aware of binary numbers then ruby also provides bitwise operators. Lets take an example a = 23 (in binary, a =10111) and b = 43 (in binary, b = 101011). a&b =3 (in binary, 000011). '&' is Binary AND operator. All operators are similar.

OperatorsDescriptionExample
& Binary AND operator a&b = 3
| Binary OR operator a|b = 63
^ Binary XOR operator a^b = 60
~ Binary AND operator ~23 = -24
>> Right shift operator 23>>2 = 95
<< Left shift operator 23<<2 = 5

Logical Operators:

These operators are also compare values and return true or false.

OperatorsDescription
and both sides are true
or at least one side is true
&& both sides are true
|| at least one side is true
! reverse the logical state, true becomes false
not same as !

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About Harish Kumar

Harish is an interested person in the field of web development and blogging. He works for the need of young web developers in learning various languages, latest technologies and other essential tips and tricks. If you need some help or you have some suggestion then you email him at harish@findalltogether.com without any hesitation. You can also suggest/demand for articles of your own choice.

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