How do I pass only one parameter to a function when it expects two?
fun multipleParams(id: Int = 1 , name: String) {
...
}
I created the above method in a class. The following method call works correctly:
multipleParams(1,"Rose")
Is it possible to use it in such a way that sometimes I only go through name
, and sometimes both?
multipleParams(1,"Rose")
multipleParams("Rose")
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You are almost there - you just need to use named arguments since you already named them:
multipleParams(name = "Rose")
This will use the default 1
for id
as it is not passed, and use "Rose"
for name
. You cannot just use positional arguments here, because you are not supplying the first argument, so use the names you provide.
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I want to add to @ Andrew Li's answer.
You can simply change the order of the arguments to achieve this.
fun multipleParams(name: String, id: Int = 1) {
...
}
Now you can call the function like this:
multipleParams("Rose", 1)
multipleParams("Rose")
Note. Preferred default arguments must be at the end of the function parameters. Then you don't need to use named arguments.
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I want to add to @ chandil03's answer.
"arguments by default should be at the end of the function parameters , but other than the Function types parameter if you want to use Lambda Expression , for example:
fun multipleParams(name: String, id: Int = 1, block: () -> Unit) {
...
}
multipleParams("Rose") {};
multipleParams("Rose", 1) {};
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