yes no Two choices
If it is sunny, we play in the park. Else, we read a book inside. We always do one of them.
- if the way right is blockedmove downelsemove right
The else block
The robot asks: is the way right blocked? A rock says yes. So it moves down. The else part is skipped.
- if the way right is blockedmove downelsemove right
When the answer is no
Same blocks, no rock this time. The answer is no. So the robot skips the if part and does the else part.
- repeat 6 timesif the way right is blockedmove downelsemove right
Ask again and again
Put if and else inside a repeat. The robot asks at every step. It climbs down the rocks like stairs!
For parents
Goal: Your child learns that if and else pick one of two paths: the if part when the answer is yes, the else part when it is no.
- Make up if and else rules together: if you finish your plate, you get fruit, else you try two more bites.
- As the robot runs, ask: which part will it do this time, the if or the else?
- Point out that the robot never does both parts in one turn.
Away from the screen: Play a hallway game. Rule: if there is a pillow in front of you, step to the side, else step forward. Put pillows on the floor and let your child follow the rule to the end.
Coding · Making Choices