Which cause a compiler error?
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int[ ] scores = {3, 5, 7};
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int [ ][ ] scores = {2,7,6}, {9,3,45};
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String cats[ ] = {"Fluffy", "Spot", "Zeus"};
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boolean results[ ] = new boolean [] {true, false, true};
To determine which option will cause a compiler error, we need to understand the syntax and rules of arrays in programming languages.
An array is a data structure that allows you to store multiple values of the same type under a single variable name. In most programming languages, arrays have a fixed size and can only store elements of the same type.
Now, let's analyze each option to identify if it will cause a compiler error:
A. int[ ] scores = {3, 5, 7}; This option is correct. It declares an integer array named "scores" and initializes it with three values: 3, 5, and 7. This code will not cause a compiler error.
B. int [ ][ ] scores = {2,7,6}, {9,3,45}; This option is incorrect. It declares a two-dimensional integer array named "scores" and initializes it with two rows and three columns. However, the array initializer is incorrect. Each row of a two-dimensional array should be enclosed in curly braces. The correct syntax should be: int [ ][ ] scores = {{2,7,6}, {9,3,45}}; The given code will cause a compiler error.
C. String cats[ ] = {"Fluffy", "Spot", "Zeus"}; This option is correct. It declares a String array named "cats" and initializes it with three strings: "Fluffy", "Spot", and "Zeus". This code will not cause a compiler error.
D. boolean results[ ] = new boolean [] {true, false, true}; This option is correct. It declares a boolean array named "results" and initializes it with three boolean values: true, false, and true. This code will not cause a compiler error.
Therefore, the option that will cause a compiler error is:
The Answer is: B
int [ ][ ] scores = {2,7,6}, {9,3,45}; doesn't compile: after the first initializer {2,7,6} is (incorrectly) applied to scores, a comma in a declaration must be followed by another variable declarator (an identifier), not a bare array literal like {9,3,45} — and a 2D array initializer also needs nested braces, e.g. {{2,7,6},{9,3,45}}. The other three lines are all syntactically valid single-array initializations and compile fine.