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A “loop” is a block for playing other blocks repeatedly. Below are some loop blocks you can use on the CreatiCode playground;
When you put one loop inside another loop, it becomes a “nested loop”. You can even have a third loop inside the inner loop.
When you run a program with a nested loop, the inner (child) loop will work like a normal loop. However, because of the outer (parent) loop, the inner loop itself will be repeated.
Here is a step-by-step example:
Step 1: The main loop is played.
Step 2: The Nested loop is started.
Step 3: The blocks inside the nested loop are played until the condition of the nested loop is completed.
Step 4: The blocks after the nested loop are played (if there are any).
Step 5: The main loop is restarted.
Note: All of the above 5 steps keep repeating until the condition of the main loop is completed.
For example, as shown below, “repeat until ” is the nested loop, which keeps the monkey moving until it touches the edge of the stage. And “repeat (5)” is the main loop which repeats the nested loop 5 times.
We use Nested loops when we want to repeat multiple blocks at the same time, until multiple conditions are completed.
For example, as shown below, nested loops are used to make the monkey move and eat bananas at the same time.