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 ! |
