What are Loops in Java?

Loops allow you to execute a block of code repeatedly until a condition is met — saving time and reducing redundancy.

Types of Loops in Java:

1️⃣ for Loop

Used when the number of iterations is known.

for (initialization; condition; update) {
    // code to be executed
}

Example: Print numbers 1 to 5

for (int i = 1; i <= 5; i++) {
    System.out.println(i);
}

2️⃣ while Loop

Used when the number of iterations is not known, and you loop while the condition is true.

while (condition) {
    // code to be executed
}

Example: Print numbers 1 to 5

int i = 1;

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

3️⃣ do-while Loop

Similar to while, but runs at least once, even if the condition is false.

do {
    // code to be executed
} while (condition);

Example: Print numbers 1 to 5

int i = 1;

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

4️⃣ Enhanced for Loop (for-each)

Used for iterating over arrays or collections.

for (datatype item : array) {
    // use item
}

Example: Loop through an array

int[] numbers = {10, 20, 30, 40};

for (int num : numbers) {
    System.out.println(num);
}

Loop Control Statements

break: Exit the loop completely

for (int i = 1; i <= 10; i++) {
    if (i == 5) break;
    System.out.println(i);
}

continue: Skip current iteration

for (int i = 1; i <= 5; i++) {
    if (i == 3) continue;
    System.out.println(i);
}