Question

1.Write code for a Java method, printArray, that takes an int array as parameter and prints it out, one element per line.

public static void printArray (int[] values){

Methods that do NOT return a result have “void” as return

type. Notice how an array parameter type is passed, int []

}// end printArray

2.Write code for a Java method that takes in as input parameter an integer number, say num, and returns a double array of size num with all entries in the array initialized to 3.0.

public static double[] arrayDouble (int num) {

Note the return type of this method: it is double[]

indicating that an array of type double is to be returned

What is the printArray? Can you explain this question? Thank you!

Answer 1

//printArray prints out the input array elements one element per line.

public static void printArray (int[] values){
  for(int i = 0;i<values.length;i++){
    System.out.println(values[i]);
  }
}


public static double[] arrayDouble (int num) {
  double res[] = new double[num];
  for(int i = 0;i<num;i++){
    res[i] = 3.0;
  }
  return res;
}