08. లూప్స్ మాస్టరీ — while, do-while, for & ఎన్‌హాన్స్‌డ్ for-each (Loops Mastery in Java)

public class LoopControlMechanics {
    public static void main(String[] args) {
        System.out.println("==================================================");
        System.out.println("      LOOP CONTROL & JUMP MECHANICS ENGINE        ");
        System.out.println("==================================================");

        // 1. continue statement skipping odd numbers
        System.out.print("Even numbers (1 to 10): ");
        for (int i = 1; i <= 10; i++) {
            if (i % 2 != 0) {
                continue; // Skip odds
            }
            System.out.print(i + " ");
        }
        System.out.println();

        // 2. break statement terminating loop on target search
        int target = 42;
        int[] sensorData = {12, 28, 35, 42, 59, 64, 88};
        int searchSteps = 0;
        boolean found = false;

        for (int reading : sensorData) {
            searchSteps++;
            if (reading == target) {
                found = true;
                break; // Stop immediately upon finding
            }
        }

        System.out.println("--------------------------------------------------");
        System.out.printf("Sensor Target %d Found? : %s (Found in %d steps)%n", 
                          target, found ? "YES" : "NO", searchSteps);
        System.out.println("==================================================");
    }
}

public class PyramidPatternEngine {
    public static void main(String[] args) {
        System.out.println("--------------------------------------------------");
        System.out.println("       NESTED LOOPS PYRAMID PATTERN ENGINE        ");
        System.out.println("--------------------------------------------------");

        int totalRows = 5;

        for (int r = 1; r <= totalRows; r++) {
            // Print leading spaces
            for (int s = 1; s <= totalRows - r; s++) {
                System.out.print("  ");
            }
            // Print asterisks
            for (int k = 1; k <= (2 * r - 1); k++) {
                System.out.print("* ");
            }
            System.out.println();
        }
        System.out.println("--------------------------------------------------");
    }
}

public class InventoryBatchScannerEngine {
    public static void main(String[] args) {
        String[] batchSkus = {
            "SKU-OK-101", "SKU-OK-102", "SKU-DEFECT-103", 
            "SKU-OK-104", "SKU-CRITICAL-CORRUPT", "SKU-OK-105"
        };

        int approvedCount = 0;
        int rejectedCount = 0;

        System.out.println("==================================================");
        System.out.println("      AUTOMATED WAREHOUSE BATCH INSPECTOR         ");
        System.out.println("==================================================");

        batchLoop:
        for (int i = 0; i < batchSkus.length; i++) {
            String currentSku = batchSkus[i];

            // Emergency stop trigger
            if (currentSku.contains("CRITICAL")) {
                System.out.printf("[EMERGENCY STOP] Severe hazard at item #%d (%s)!%n", i + 1, currentSku);
                System.out.println("Conveyor motor shut down immediately.");
                break batchLoop;
            }

            // Quality assurance defect skip
            if (currentSku.contains("DEFECT")) {
                System.out.printf("[REJECTED] Item #%d (%s) failed quality control. Skipped.%n", i + 1, currentSku);
                rejectedCount++;
                continue;
            }

            System.out.printf("  Item #%d: %s [PASSED & PACKAGED]%n", i + 1, currentSku);
            approvedCount++;
        }

        System.out.println("--------------------------------------------------");
        System.out.printf("  Approved for Shipment : %d unit(s)%n", approvedCount);
        System.out.printf("  Defective Discarded   : %d unit(s)%n", rejectedCount);
        System.out.println("==================================================");
    }
}