Loops

Loops let you repeat a block of code multiple times. They are essential for traversing arrays, processing data, and implementing algorithms.

for loop
Best when you know the number of iterations.

for (int i = 0; i < 5; i++) {
    System.out.println(i);
}

while loop
When condition is checked before execution.

int i = 0;
while (i < 5) {
    System.out.println(i);
    i++;
}

do-while loop
Executes at least once.

int i = 0;
do {
    System.out.println(i);
    i++;
} while (i < 5);

Enhanced for loop (for-each)
For iterating over arrays/collections.

int[] numbers = {1,2,3};
for (int num : numbers) {
    System.out.println(num);
}

break and continue
break exits the loop; continue skips the current iteration.

Two Minute Drill

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