Groovy: Unary Arithmetic Operators

Unary Arithmetic operators are divided into four categories

a.   Unary Plus (+)

b.   Unary Minus (-)

c.    Pre, post increment operator (++)

d.   Pre, post decrement operator (--)

Unary Plus (+) and Unary Minus (-)

HelloWorld.groovy

a = +10
b = -10

println "Value of a is ${a}"
println "Value of b is ${b}"

Output

Value of a is 10

Value of b is -10

++ Increment operator; increments a value by 1

-- Decrement operator; decrements a value by 1

Pre increment

    Syntax:

    ++variable

      pre increment operator increments the variable value by 1 immediately.

HelloWorld.groovy

a = 10
println "++a : ${++a}"

Output

++a : 11

Post increment

    Syntax:

        variable++

 Post increment operator increments the variable value by 1 after executing the current statement.

HelloWorld.groovy

a = 10
println "a++ : ${a++}"
println "a : ${a}"

Output

a++ : 10

a : 11

Pre Decrement

    Syntax:

        --variable

 Pre decrement operator decrements the variable value by 1 immediately.

HelloWorld.groovy

a = 10
println "--a : ${--a}"

Output

--a : 9

Post Decrement

    Syntax:

        variable--

post decrement operator decrements the variable value by 1 after executing the current statement.

HelloWorld.groovy

a = 10
println "a-- : ${a--}"
println "a : ${a}"

Output

a-- : 10

a : 9

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