Java for loop example

Rebecca 149 Published: 12/09/2024

Java for loop example

I'd be happy to provide a detailed explanation of the Java for loop and provide an example.

The for loop is one of the most commonly used control structures in programming, particularly in Java. It is used to execute a block of code repeatedly for a specified number of iterations. The general syntax of the for loop is as follows:

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

Let's break down each part of the loop:

Initialization: This is where you initialize a variable that will be used in your loop. It's like setting up a counter. Condition: This is where you specify the condition for your loop to continue running. If this condition is false, the loop stops. Increment: This is where you update the value of the variable after each iteration.

Here's an example of using a for loop to print the numbers from 1 to 10:

public class ForLoopExample {
public static void main(String[] args) {
for (int i = 1; i <= 10; i++) {
System.out.println(i);
}
}
}

In this example, we're using the for loop to print out the numbers from 1 to 10. Here's how it works:

The initial value of i is set to 1 (int i = 1;) The condition for the loop is that i should be less than or equal to 10 (i <= 10;). As long as this condition is true, the loop will continue. After each iteration, the value of i is incremented by 1 (i++).

When you run this program, it will print out the numbers from 1 to 10:

1 2 3 4 5 6 7 8 9 10

This is a simple example, but the for loop can be used to iterate over arrays or collections, generate sequences of values, and more. The key thing to remember is that it's a powerful tool for controlling the flow of your program.

Now, let me summarize what we've learned:

The for loop in Java is used to execute a block of code repeatedly for a specified number of iterations. The general syntax is for (initialization; condition; increment) { }. You can use the for loop to print out sequences of values, iterate over arrays or collections, and more.

I hope this explanation helps you understand how the Java for loop works!

How to write a program to print your name 5 times using for loop in Java?

I'd be happy to help you with that.

To write a Java program that prints your name five times using a for loop, follow these steps:

Step 1: Declare the variable

Start by declaring a String variable to store your name. For example:

String myName = "John Doe"; // replace with your actual name

Step 2: Initialize the for loop

Next, define a for loop that will iterate five times:

for (int i = 0; i < 5; i++) {
// print your name here
}

The for loop consists of three parts:

The initialization part (int i = 0;) The condition part (i < 5;) The increment part (i++)

In this case, the loop will iterate five times because the condition i < 5 is true when i is less than 5.

Step 3: Print your name inside the for loop

Inside the for loop, use a System.out.println() statement to print your name:

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

The System.out.println() method prints its argument followed by a newline character.

Putting it all together

Here's the complete code:

public class PrintMyName {
public static void main(String[] args) {
String myName = "John Doe"; // replace with your actual name
for (int i = 0; i < 5; i++) {
System.out.println(myName);
}
}
}

How it works

When you run the program, the for loop will iterate five times. Each iteration, the System.out.println() statement will print your name followed by a newline character. The output will be:

John Doe John Doe John Doe John Doe John Doe

Replace "John Doe" with your actual name, and you'll see it printed five times!

That's it! You now have a Java program that prints your name five times using a for loop.