For loop

Suppose we want to print 1-100, we can write the following code:

print 1
print 2
print 3
...
print 100

However, the above code is not only tedious, but would quickly become impossible if we want to print a large number, say 1 billion. This is where the for loop comes in.

For loop executes some code repeatedly. To solve the problem above, we will:

1. Start from number 1
2. Print the current number
3. If the current number is equal to the end number (such as one billion), stop printing, otherwise , increase the current number by 1 and repeat step 2

Add Node

Right-Click anywhere on canvas, select Flow Control/For

Usage

Connect Body handle to a Print node, and use the Index handle as the input of Print node. When executed, the Print node will print the current index, starting from 0.

TIP

Unlike other programming languages, End is included in the loop

Loop Completion

After the loop is finished, nodes connected to Completed handle will be executed.

Dynamic Start and End

The value of the Start and End handle would come from other nodes: