Category: Java

Added: 13th of November 2021

Viewed: 219 times

Simple for loop in Java. Print the numbers 1 to 10 in the console

What does the code do?
The java code below prints the numbers 1 to 10 in the console / terminal

public class forLoop {

public static void main(String args[]) {

int counter;

for (counter=1; counter<=10; counter++) {
System.out.println(counter);
}
}
}


Create a new file then copy and paste the code above
Save the file as forLoop.java

Next open the terminal, and enter the following command to compile the file
javac forLoop.java


A new file named forLoop.class will be created

To execute the code enter the following command
java forLoop


As I'm learning Java, I will try my best to explain what's going on in the code. Getting the terminology right is sometimes harder than the actual coding itself.

To start with we create a new variable. As we are dealing with whole numbers we set variable counter as an integer

int counter

If we want to repeat a specific block of code (x) number of times we use a for loop.

for (start; condition; increment)

We want to print the numbers 1 to 10 in the console. We set the variable counter=1 followed by counter<=10, less than or equal to 10

We also need to add 1 to variable counter after each loop, so we use counter++;.
counter++ is also the same counter=counter+1

We then use System.out.println(counter) to print out the variable

The for loop ends, once the variable int counter reaches 10

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