Cannot figure out what declaration to put in

[matthew meltzer]

Q17: What declaration needs to be added into line (1) in order for this program
to print out 90 to the standard output?

public class Q17{
  public static void main(String[] args){
    //(1) INSERT DECLARATION HERE...
    int sum = 0;
    for(int i : nums)
      sum += i;
    System.out.println(sum);
  }
}

I'm trying to figure out exactly what I have to put at line 1 to make the program print out 90 but I am getting nowhere and all my efforts lead to compilation errors.
Could anyone help point me in the right direction?

Thank you,

-Matthew Meltzer

[Jeanne Boyarsky]

What variable name is needed to make the code compile?

What type must it be? (There is actually more than one right answer to this one)

Start with these two and you'll get compiling code that doesn't print 90. Then try adding one value and seeing what gets printed. This will give you a clue as to the required values.

[Henry Wong]

matthew meltzer wrote:Q17: What declaration needs to be added into line (1) in order for this program
to print out 90 to the standard output?

public class Q17{
  public static void main(String[] args){
    //(1) INSERT DECLARATION HERE...
    int sum = 0;
    for(int i : nums)
      sum += i;
    System.out.println(sum);
  }
}

I'm trying to figure out exactly what I have to put at line 1 to make the program print out 90 but I am getting nowhere and all my efforts lead to compilation errors.
Could anyone help point me in the right direction?

Hint: what types of objects can be looped through by the for-each loop?

[EDIT: note to self ... when returning to your computer, make sure to click reload before responding -- as the question may already been answered... ]

Henry

[matthew meltzer]

http://ideone.com/9MX8Z

I keep getting an error regardless of how I change things.

[Jeanne Boyarsky]

"num" is correct on the line you added. int isn't the correct type. What types call you loop through using an enhanced for loop?

[matthew meltzer]

arrays. I should have known. Thanks!

[Jeanne Boyarsky]

Yay! Thanks for bearing with us as you discovered the answer. You learn more that way. And we get to enjoy seeing you make the discovery!