How to remove a parenthesis from an output in Scala
Multi tool use
How to remove a parenthesis from an output in Scala
I have the following output:
The food order cost is:
$84.9
()
from this function:
def foodBill(foodCost: List[Double]) = {
if (foodCost.length <= 1) {
println("The food order cost is: ")
foodTotal.foreach(x=>println("$"+ x))
} else {
println("The food order for each table is: ")
foodCost.foreach(x => println("$"+ x))
}
}
Thus, my question is how to remove the () from the output and have the following:
The food order cost is:
$84.9
Thanks
And what are you trying to achieve?
– user152468
Jun 30 at 11:01
@user152468, Im calling it as follows: println(foodBill(foodTotal)) and I'm trying to print out the food bill.
– mike
Jun 30 at 11:04
@user152468, is there a way without using an object
– mike
Jun 30 at 11:04
1 Answer
1
Instead of
println(foodBill(List(84.9)))
you should invoke it just as
foodBill(List(84.9))
This is not some kind of stringly-typed bash script, printing strings to the standard output is not the same as returning a value.
why is the unit type is returning from my function?????. Thanks for the answer.
– mike
Jun 30 at 11:07
@mike It returns
Unit because every branch of the if returns a Unit. Each branch returns Unit because foreach returns Unit. That's why you should ascribe the return type explicitly. If you had declared it as def foodBill(foodCost: List[Double]): Unit, there wouldn't be any questions.– Andrey Tyukin
Jun 30 at 11:08
Unit
if
Unit
Unit
foreach
Unit
def foodBill(foodCost: List[Double]): Unit
I know but why is type being outputted
– mike
Jun 30 at 11:10
What do you mean by "type being outputted"?
() is not a type. It's the only value of type Unit, returned by the foreach.– Andrey Tyukin
Jun 30 at 11:11
()
Unit
foreach
yes you have answered my question. I thought () this was a type but it was a value. I understand now. Thanks again
– mike
Jun 30 at 11:13
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How do you call your function?
– user152468
Jun 30 at 10:58