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16 Cards in this Set

  • Front
  • Back
Are C# arrays 0-indexed or 1-indexed?
C# arrays are 0-indexed.
What .NET namespace contains the Array base class?
Show a code snippet that declare an array of 10 integers.
int[] intArray = new int[10];
Show a code snippet that references the last element of the following array.

int[] intArray = new int[5]
int someInt = intArray[4].

Remember arrays in C# are 0-based.
What is the value of the 3rd element in the following array?

int[] intArray = new int[5];
0 -- integers are defaulted to 0 if not otherwise assigned.
Create an array of integers that is where the elements contain the values of the first 5 prime numbers.
int[] intArray = new int[5]
Create a string array containing the names of the months of the year.
Write a code snippet that extracts the name of the 5th month from the array.
string[] theMonths = new string[]
{"Jan", "Feb", "Mar", "Apr", "May" ...}

string fifthMonth = theMonths[4];
Suppose that myClass is a public class. Consider the following snippet

myClass[] myArray = new myClass[5];

What is the value of myArray[3] immediately after the execution of this statement?
myArray[3] is null.
Show a code snippet that passes an array that is initialized and passed in one step

CalcAverage(new int[] {1,2,3,4,5});
Write a code snippet that creates a multidimensional integer array of dimension 2x3.
int[,] multiArray = new int[2,3];
Suppose that you create an array variable but do not assign dimensions or initialize it. How do you assign values to it?
int[] intArray;
intArray = new int[] {1,2,3,4};
Show a snippet that creates and initializes a 2x3 array in one statement.
int[,] intArray = new int[,]
What is a "jagged" array?
A "jagged" array is an array whose elements are also arrays.
Write a snippet that creates an array with 3 elements that are 3,4,5 element integer arrays, respectively.
int[][] jaggedArray =
new int[3][];
jaggedArray[0] = new int[3];
jaggedArray[1] = new int[4];
jaggedArray[2] = new int[5];
Write a code snippet that creates a jagged array with three elements that points to three multidimensional arrays.
int[][,] jaggedArray = new[3][];
jaggedArray[0] =
new int[,] {{1,2},{3,4}};

Show a simple example of how the "foreach" statement is used with arrays.
// initialized without use of 'new'
int[] intArray = {1,2,3,4,5};

foreach (int i in intArray)
Console.WriteLine("The value of the {0} element {1}.", i, intArray[i-1]);