Lesson 9.3a introduced the repeat loop. Another type of loop is known as the "for" loop. It can do the same thing as the repeat loop, but its syntax is a little more complicated:

Though most programming languages label the for loop with the word "for," RoboBlockly uses "count" to emphasize that the for loop implements a counting type of iteration. The for loop uses a counter variable (often named "i") that runs from a minimum to a maximum value (1 to 10 in the example above) with a specified interval size (1 in this example; if it's 2, it would be counting by 2's, etc.). The name "for loop" comes from the idea that we want to do something "for a certain number of times."

Even though the repeat loop syntax is simpler, the for loop is more versatile, and therefore some programming languages don't implement both. It's therefore important to know about both, and RoboBlockly has both available (though, as seen, it labels the for loop as a "count" loop). So in this lesson we will see how to use a for loop to do the same thing as the previous lesson.