Java Nested Loops

In Java, nested loops are loops within loops, allowing for more complex iteration patterns. Here's a concise overview:

Syntax:

for (initialization1; condition1; update1) {
    // Outer loop code
    for (initialization2; condition2; update2) {
        // Inner loop code
    }
}

Nested Loop Example:

• Example of a nested for loop:

for (int i = 1; i <= 3; i++) {
    for (int j = 1; j <= 3; j++) {
        System.out.println("i = " + i + ", j = " + j);
    }
}

Output:

i = 1, j = 1
i = 1, j = 2
i = 1, j = 3
i = 2, j = 1
i = 2, j = 2
i = 2, j = 3
i = 3, j = 1
i = 3, j = 2
i = 3, j = 3

Use Cases:

• Generating patterns, such as matrices or tables.
• Processing multi-dimensional arrays.
• Solving certain mathematical problems.
• Implementing algorithms like sorting or searching.

Summary

Nested loops provide a way to perform repetitive tasks with multiple levels of iteration in Java. Understanding how to use nested loops is essential for handling complex iteration patterns and implementing various algorithms and data structures.