Question

Which of the following are valid arrays?

I. int[] coolArray = {1, 2, 3};
II. int[] threeThings = {1.0, 2.0, 3.0};
III. int[] = {"1", "2", "3"};

Answer 1

In the context of programming, only Option I, 'int[] coolArray = {1, 2, 3};', represents a valid integer array declaration. Options II and III fail due to incompatible data types and a missing array name, respectively.

Step-by-step explanation:

The question at hand is asking which of the provided code snippets represent valid arrays in the context of programming, specifically within languages like Java. When declaring arrays, the data types must be consistent and compatible with the array's declared type.

• Option I: int[] coolArray = {1, 2, 3}; This is a valid array. It is properly declared with integer values.
• Option II: int[] threeThings = {1.0, 2.0, 3.0}; This is not a valid array. The values are floating-point numbers (doubles), not integers.
• Option III: int[] = {"1", "2", "3"}; This is not a valid array. The values are string literals, not integers, and the array name is missing.

Therefore, only Option I represents a valid array declaration.