Module 1: Loops

While Loops

A while loop executes a block of code as long as its condition remains true.

// Example: Counting from 1 to 5 using a while loop
int count = 1;
while (count <= 5) {
    System.out.println("Count is: " + count);
    count++;
}
                

For Loops

A for loop provides a compact way to iterate over a range of values with initialization, condition, and iteration expressions.

// Example: Counting from 1 to 5 using a for loop
for (int i = 1; i <= 5; i++) {
    System.out.println("Count is: " + i);
}
                

Nested Loops

Nested loops place one loop inside another, often used for working with multi-dimensional data.

// Example: Printing a simple pattern using nested loops
for (int i = 1; i <= 3; i++) {
    for (int j = 1; j <= i; j++) {
        System.out.print("* ");
    }
    System.out.println();
}
// Output:
// * 
// * * 
// * * *
                

Break Statement

The break statement immediately terminates the loop it's in.

// Example: Using break to exit a loop early
for (int i = 1; i <= 10; i++) {
    if (i == 6) {
        System.out.println("Breaking the loop at i = " + i);
        break;
    }
    System.out.println("Value of i: " + i);
}
                

Continue Statement

The continue statement skips the current iteration and proceeds to the next one.

// Example: Using continue to skip even numbers
for (int i = 1; i <= 10; i++) {
    if (i % 2 == 0) {
        continue; // Skip even numbers
    }
    System.out.println("Odd number: " + i);
}
                

• Loops Practice Repository
• Java For Loops Documentation
• Java While Loops Documentation

• Write a program that prints numbers 1-10 using different loop types
• Create nested loops to print patterns
• Implement a loop that finds the sum of numbers in a range
• Debug a program with infinite loop issues