Is there a way to use ++ on Int in scala?

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++ operator in Scala

I want to increment an Int variable in scala. But, because Int is immutable, I have to do this

var myInt: Int = 5
....
myInt = myInt + 1

which seems a little too complicated. What I would like to do is

var myInt: Int = 5
....
myInt++

however, since Int is immutable, I can't do this. Is there any solution? Because I can't be first who would want to use ++ on integer variable...

TL;DR create a custom increment function: `def inc(i:Int) = i+1` — dirkgently, Jun 16 '12 at 22:37
try scala without var in most vases you won't need it anyway — AndreasScheinert, Jun 17 '12 at 20:20

score 7 · Accepted Answer · answered Jun 16 '12 at 22:37

7

A ++ operator is not a language construct of Scala, and the desired behaviour cannot be achieved with a regular method definition. But Scala offers at least some syntactic help, in that a call a += b will be automatically expanded to a = a + b unless a direct method += exists. Thus:

var myInt = 5
myInt += 1

answered Jun 16 '12 at 22:37

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`a+=1`, that's quite enough for me. Thanks! – Karel Bílek Jun 16 '12 at 22:38

Is there a way to use ++ on Int in scala?

1 Answers1