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
Question
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
Solution
The answer is 4 and 5.
Here's why:
In Java, when you create a 2D array like double[][] x = new double[4][5], the first number in the brackets (4) is the number of rows and the second number (5) is the number of columns.
So, x.length will give you the number of rows, which is 4.
x[2].length will give you the number of columns in the third row (since array indices start from 0), which is 5.
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