Scala not converting Int to String

Question

In the following code, Scala is unable to convert Into to String. Why?

object Upper{
    def main(args:Array[String]){
        val number:Int= 1;
        val no=3.3; 
        println(args.map(_.toUpperCase())+(no+number));
    }

}

Error is

error: type mismatch;
 found   : Int
 required: String
                println(args.map(_.toUpperCase())+(no+number));
                                                      ^
one error found

What exactly are you trying to do here? Are you trying to print the string "[Ljava.lang.String;@...4.3" to the screen? If so, you can just convert no + number to a string yourself using toString or "" +. If not, your problem is not related to the fact that the number isn't converted to a string and you need to explain what you actually want to happen. — sepp2k
– sepp2k, Commented Sep 19, 2017 at 11:41

ghostdogpr · Accepted Answer · 2017-09-19 11:41:04Z

2

It is because args.map(_.toUpperCase()) returns an Array, not a String. You can use mkString to create a String from the Array:

println(args.map(_.toUpperCase()).mkString(",") + (no + number))

answered Sep 19, 2017 at 11:41

ghostdogpr

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