Error message and problem with code

Question

Hi all,
I have a code that i need to print the total
ie: retail multiplied by the quantity entered
this is what I have written
but when compiling error message is (not a statement )
any tips appreciated
or is this part of the code completely wrong???
Remembering that I have 4 arrays in the code
paul
System.out.println((input_part +"\t"+ "\t" + qty[input_part-1]+"\t"+ "\t"retail[input_part-1]+"\t"+ "\t" + "\n");
or is this more appropriate??
total=(quantity*cost);
System.out.println("Total Retail is:" + total);
But with this i get error
Operator * cannot be applied to int, double[]
total=(quantity*cost);

Answer 1

System.out.println((input_part +"\t"+ "\t" + qty[input_part-1]+"\t"+
"\t"retail[input_part-1]+"\t"+ "\t" + "\n");Look at what comes before "retail" in your code sample, and after the "\t" that immediately preceeds it. Should there really be nothing between those two values?
But with this i get error
Operator * cannot be applied to int, double[]
total=(quantity*cost);It's telling you that you can't apply the operator * (multiplication) to an integer and an array.
Did you really think that you'd be able to multiply a number by an array?
Perhaps you meant to do something like
total = quantity * cost[lastElt];