Source code
public class PrimeNumbers {
public static void main(String[] args) {
int start = 1;
int end = 10000;
for (int i = start; i <= end; i++) {
boolean isPrimeNumber = true;
for (int j = 2; j < i; j++) {
if (i % j == 0) {
isPrimeNumber = false;
break;
}
}
if (isPrimeNumber) {
System.out.println(i);
}
}
}
}
Run 1
The code is generally readable: it has a clear structure, uses flat nesting (only two levels), and communicates intent well through variable names like isPrimeNumber. Each action is placed on its own line, and the reading flow follows a natural top-to-bottom progression. The main logic is concise and straightforward. However, it loses some points for minor inefficiency: the inner loop runs unnecessarily for non-prime detection beyond the square root of i, and the boolean flag plus break pattern is slightly less elegant than a direct method like isPrime(). These issues do not hurt readability significantly, but a helper method would improve clarity and reusability.
Run 2
The code is generally readable but has several issues. Structure is logical (main method, nested loops), and variable names like 'isPrimeNumber' are clear. However, main missing action granularity/clarity: the primality test is buried in the main method instead of being extracted into a method like 'isPrime()', which reduces reusability and intent. The inner loop needlessly checks all numbers up to i-1 (should stop at sqrt(i)), but this is an efficiency issue, not readability. Nesting is only two levels deep, which is acceptable. Reading flow is natural: outer loop, inner check, then print. Code length is concise but could be shorter with a helper method. Action granularity is one action per line, which is fine. Overall, it’s easy to follow but lacks modularity and would benefit from extracting the prime-check logic. These deductions justify a below-average score for clarity and structure.
Run 3
The code is highly readable. Structure is logical: constants define the range, a primary loop iterates through candidates, and a helper flag tracks primality. Nesting is limited to two levels, and the break statement prevents unnecessary work. Intent is clear—print prime numbers within a range. Code length is concise and appropriate for the task. Each statement performs a single action. Reading flow is natural: initialize range, check each number, print if prime. Minor deductions: the algorithm is inefficient and the flag name is slightly verbose, but these don't materially affect readability.
Run 1
Code Structure: Logically organized into range setup, candidate iteration, divisor testing, and output. Nesting: Moderate nesting from two loops and a conditional, but the short blocks remain easy to follow. Clarity of intent: The class name and isPrimeNumber flag clearly communicate the purpose; i and j are conventional but less descriptive than candidate and divisor. Initializing start to 1 incorrectly includes 1 as prime, slightly undermining the expressed intent. Code length: Concise, with no unnecessary boilerplate beyond the standard Java entry point. Action granularity: Each statement performs one clear action on its own line. Reading flow: Natural top-to-bottom progression, aided by consistent indentation and blank lines separating stages.
Run 2
Code Structure: Logically organized into range setup, primality testing, and output, though extracting the test into a method would improve separation. Nesting: Two loops and an inner conditional create moderate, manageable nesting; the break avoids further complexity. Clarity of intent: The class name and isPrimeNumber flag clearly communicate the purpose, while i and j are conventional but less descriptive. Starting at 1 incorrectly treats 1 as prime, slightly undermining the stated intent. Code length: Concise, with no unnecessary statements. Action granularity: Each statement performs one clear action, and control-flow blocks are easy to distinguish. Reading flow: Consistent indentation and blank lines support a natural top-to-bottom progression.
Run 3
Code Structure: Logically organized into range setup, candidate iteration, divisor checking, and output, though extracting the primality check would improve separation. Nesting: Moderate nesting from two loops and a conditional remains manageable. Clarity of intent: The class name and isPrimeNumber flag clearly communicate the purpose, but i and j are less descriptive, and treating 1 as prime undermines the intended behavior. Code length: Concise, with no unnecessary statements. Action granularity: Statements generally perform one action per line; the conventional for-loop headers are easy to follow. Reading flow: Execution proceeds naturally from initialization through checking to printing, with whitespace separating the main steps.