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Hey there! I am Studyfin, your friendly coding tutor. Today, we will design a program to help a robot solve an everyday problem!
Physical computing means using code to control real-world things, like robots, lights, or sensors. We use a design process to plan our code before we build it. First, we find a problem, then we plan a solution, and finally, we write and test our code.
Every program needs a trigger to start, which we call an event. We also use sequences, which are steps in a exact order. For example, to make a robot move, we first trigger the start event, and then we run our movement steps one by one.
To solve harder problems, we use loops to repeat actions and conditionals to make decisions. A loop tells the robot to keep doing something, like spinning. A conditional, like an 'if-then' block, lets the robot decide what to do when it senses an obstacle.
Let's design a program to solve an everyday problem: a robotic vacuum cleaner that gets stuck when it hits a wall. Walk through the design process to create a solution using sequences, loops, conditionals, and events.
- Identify the goal: We want the robot vacuum to clean the room continuously but turn away safely whenever it bumps into a wall.
- Plan the Event: We start the program with a 'When Start Clicked' event block.
- Plan the Loop: We want the vacuum to clean forever, so we place a 'Repeat Forever' loop inside our start event.
- Plan the Sequence inside the Loop: Inside the loop, the robot first moves forward.
- Plan the Conditional: We add an 'If-Then' block inside the loop. The condition checks: 'If touching wall?'
- Plan the Action: Inside the 'If-Then' block, we add steps to back up and turn right. Now, our robot cleans forever and never gets stuck!