Operators

Arithmetic Operators

a + b           # Adition
a - b           # Subtraction
a * b           # Multiplication
a / b           # Division
a % b           # Modulus
a**b            # Exponent

Comparison Operators

a == b          # Checks if the value of two operands are equal
a != b          # Checks if the value of two operands are different
a > b           # Checks if the value of left operand is greater than the value of right operand
a < b           # Checks if the value of left operand is less than the value of right operand
a >= b          # Checks if the value of left operand is greater than or equal to the value of right operand
a <= b          # Checks if the value of left operand is less than or equal to the value of right operand
a <==> b        # Returns 0 if first operand equals second, 1 if greater and -1 if less
(1...10) === 5  # Used to test equality within a when clause of a case statement
a.eql?(b)       # Check if the type and value are equals
a.equal?b       # Check if the the objects have the same id

Logical Operators

a && b          # "and" operator (higher precedence)
a and b         # "and" operator 
a || b          # "or" operator (higher precedence)
a or b          # "or" operator 
!a              # Negation operator (higher precedence)
not a           # Negation operator

Bitwise Operators

a = 60          # 0011 1100 in binary format
b = 13          # 0000 1101 in binary format
------------------
a&b             # 0000 1100
a|b             # 0011 1101
a^b             # 0011 0001
~a              # 1100 0011

Parallel Assignment

a, b, c = 10, 20, 30  # a = 10, b = 20, c = 30
a, b = b, c           # Swapping the values

Ternary Operator

true ? "true" : "false"   # Result is "true"