Basics
Java Loops
Loop Structures
Java loops use for foreach and while with break and continue.
Introduction to Java Loops
Loops in Java are used to execute a block of code repeatedly as long as a specified condition is met. They are a fundamental aspect of programming that allows developers to create efficient and concise code. Java supports several types of loops: for, foreach, and while. Additionally, Java provides control statements like break and continue to alter the flow of loops.
For Loop
The for loop is used when the number of iterations is known beforehand. It consists of three parts: initialization, condition, and increment/decrement. Here's a basic structure of a for loop:
Foreach Loop
The foreach loop, also known as the enhanced for loop, is used to iterate over arrays or collections. It's a simpler, cleaner way to iterate when you don't need to manipulate the index variable.
While Loop
The while loop is used when the number of iterations is not known beforehand. The loop will continue to execute as long as the specified condition is true. Here's an example:
Using Break and Continue
The break statement is used to terminate the loop immediately, while the continue statement skips the current iteration and proceeds with the next one. These statements can be particularly useful in controlling loops when certain conditions are met.
Conclusion
Understanding loops is crucial for efficient coding in Java. With the ability to repeat tasks and control flow using break and continue, loops can significantly streamline your code. Practice these loops and their control statements to master their usage.
