FCT 1063: Understanding Arrays

These flashcards cover key definitions, declarations, and examples of arrays and multidimensional arrays from the lecture notes.

What is an array in programming?

A collection of elements of the same data type, stored in contiguous memory locations and accessed using an index.

How do you declare an array?

Using the syntax: dataType arrayName[size];

What are the rules for declaring an array?

1. All elements must be of the same datatype. 2. The size of the array is fixed upon declaration. 3. The first element is at index 0. 4. The array must be declared before use.

What is the initialization syntax for an array?

dataType arrayName[size] = {elements};

How many elements can the array int scores[5] hold?

It can hold 5 elements.

What is the value stored at index 2 in the array numbers[5] = {10, 20, 30, 40, 50}?

30.

What happens if you access numbers[5] in the numbers array?

It causes out-of-bounds access (undefined behavior).

What is a multidimensional array?

An array of arrays that stores data in more than one dimension, commonly a 2D array.

Provide an example of a 2D array declaration.

string letters[2][4] = { { 'A', 'B', 'C', 'D' }, { 'E', 'F', 'G', 'H' } };

How do you access an element in a multidimensional array?

Using the syntax: arrayName[row][column]. For example, letters[1][2] returns 'G'.