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.

Operators | Description | Example |

+ | addition | 4 + 5 = 9 |

- | subtraction | 12 - 34 = -22 |

* | Multiplication | 2*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.

Operators | Description | Example |

== | 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.

Operator | Description | Example |

= | 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.

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

Output:

- 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.

Operators | Description | Example |

& | 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.

Operators | Description |

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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