java for loop increment by 3

To increment the loop variable by 3 in a for loop in Java, you can use the += operator to add 3 to the loop variable on each iteration.

Here's an example of how to do it:

public class Main {
  public static void main(String[] args) {
    // Count from 1 to 10 by 3s
    for (int i = 1; i <= 10; i += 3) {
      System.out.println(i);
    }
  }
}

This code creates a for loop that starts at 1, continues until it reaches 10, and increments the loop variable i by 3 on each iteration. The loop variable i is initialized to 1 before the loop starts, and the loop condition i <= 10 is checked before each iteration. If the condition is true, the loop continues; if the condition is false, the loop ends.

The for loop is a useful tool for performing a set of actions a specific number of times, or for iterating over the items in an array or other collection. You can use the += operator or any other assignment operator to modify the loop variable in any way you like.