In following tutorial we will quickly go through all the operators which both Java and Groovy support.
We will also understand Groovy specific power operator.
Arithmetic operators
Groovy supports all Java arithmetic operators i.e. +, , *, / and %.
The power operator
Additionally Groovy includes a new operator ** in the list. this operator is used to perform power operation.
println 2**4 16
As Groovy converts primitives to corresponding Number wrappers (tutorial), the resultant value of all above operators will also be also one of the Number type:
def x = 2 * 2.1 //groovy always converts decimal number to bigDecimal
println x
println x.getClass()
println x.add(3)//using BigDecimal.add() method. 4.2 class java.math.BigDecimal 7.2
def x = 2.1 ** 2
println x
println x.getClass()
println x.toBigInteger() 4.41 class java.math.BigDecimal 4
Unary operators
All Java unary operators are supported:
+ for positive value of the operand,  for negative value of the operand,
++ increment, postfix/prefix,  decrement, post/prefix and ! logical complement operator
Assignment arithmetic operators
All assignment operators of Java are supported in the same way. These operators are =, +=, =, *=, /= and %=
Additionally Groovy also has assignment operator for its power operation i.e. **=
def x = 5
x **= 3// same as x = x**3
println x 125
Equality and Rational operator
Same as Java: == (equal), != (not equal), < (less than), <= (less than or equal), > (greater than) and >= (greater than or equal).
Rational operators (Conditional operators)
Same as Java: && (logical and),  (logical or) and ! (logical not). && and  also exhibit 'shortcircuiting behavior).
Bitwise operators
Same as Java: & (bitwise and),  (bitwise or), ^ (bitwise xor) and ~ (bitwise negation).
Ternary operator
Same as Java: result = boolean expression? result1: result2
