A value that is incremented or decremented and then not stored is at best wasted code and at worst a bug.
Noncompliant code example
fun pickNumber() : Int {
var i = 0
var j = 0
i = i++ // Noncompliant; i is still zero
return j++ // Noncompliant; 0 returned
}
Compliant solution
fun pickNumber() : Int {
var i = 0
var j = 0
i++
return ++j
}
