Assume double[][] x = new double[4][5], what are x.length and x[2].length? Group of answer choices4 and 44 and 55 and 45 and 5

Break Down the Problem

1. Determine the length of the outer array x.
2. Determine the length of the inner array x[2].

Relevant Concepts

• In Java, an array's length can be accessed using the .length property.
• A two-dimensional array in Java is essentially an array of arrays.

Analysis and Detail

1. For the array x = new double[4][5]:

   • The outer array has 4 elements (which means there are 4 inner arrays).
   • Each inner array (in this case: x[0], x[1], x[2], x[3]) is initialized with a length of 5.

2. Specifically:

   • x.length returns the number of inner arrays, which is 4.
   • x[2].length returns the length of the inner array at index 2, which is 5.

Verify and Summarize

• After analyzing both lengths, we find:
  • x.length = 4
  • x[2].length = 5

Final Answer

The answer is: 4 and 5.