Nairda

Read two numbers typed into the terminal and print their sum. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create a text variable called terminal. We create two number variables, num1 and num2. Above the loop we clear the terminal with an empty Set. Behind it we read the first number with Wait. And behind that we read the second number the same way. Behind it we put Join with a sum inside. The sum adds num1 and num2. On the dashboard we draw a terminal and give it the variable terminal. When you finish, the app takes you straight to the next tutorial in the path. ...

Split the work into four functions: clear the table, fill it with random numbers, add them up and print the average. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We create a table called data. We create two number variables, index and result. We create a text variable called terminal. We create the four functions: clear, fill, compute and print. And the other two functions, compute and print. In the clear canvas we empty the terminal. Behind it we add a Repeat. It runs as many times as the table is wide. Inside the Repeat we remove one column, so the table ends up empty. In the fill canvas we set index back to 0. Behind it a Repeat of 10 turns, one per number. Inside it we write a random number into the table. The random number goes from 0 to 100. The column it writes into is the variable index. Behind it we add a Set with an operation inside. The operation adds one to index, to move to the next column. And we add a new column, so there is room for the next one. In the compute canvas we set index back to 0. Behind it a Repeat of 10 turns, one per number. Inside it we add a Set with an operation inside. What it sums is result itself, so the numbers pile up. What it adds is what the table holds at the column index. Behind it we add another Set with an operation inside. That one adds one to index, to move to the next column. After the Repeat we add one more Set, with an operation inside. We change that operation to a division. It divides result by 10, which is the average of the ten numbers. In the print canvas we set index back to 0. Behind it another Repeat of 10 turns. Inside it we add a Join, which writes into the terminal. What it writes is what the table holds. And the column it reads is the variable index. Behind it we add a Set with an operation inside. The operation adds one to index, to move to the next column. After the Repeat we write the word result. And behind it the value of result. Back in the main canvas we add a While loop, which repeats forever. Above it we call fill, which loads the table. And above that, clear, so the table starts empty. And behind them we call compute and print. On the dashboard we draw a terminal. And we drag the variable terminal onto it. When you finish, the app takes you straight to the next tutorial in the path. ...

Turn a potentiometer to change the pitch, mapping the reading up to 1500 hertz. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We declare a frequency called buzzer on pin 9. We declare a potentiometer called pot on analog pin 0. We create a number variable called reading. Inside the loop we set reading to what the pot measures. Behind it we put the buzzer with a Map block in its hertz. We map the variable reading from 0 to 100 into 0 to 1500 hertz. When you finish, the app takes you straight to the next tutorial in the path. ...

Read a push button on a digital pin and draw its value on the dashboard chart. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create a number variable called reading. We declare a digital input called button on pin 2. Inside the loop we set reading to what the button gives us. On the dashboard we draw a chart and give it the variable reading. When you finish, the app takes you straight to the next tutorial in the path. ...

Read a number typed into the terminal and do math with it using the To number block. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create a text variable called typed. We create a number variable called result. Inside the loop we save whatever is typed into typed. Behind it we set result to a sum. To number turns the text into a number that can be added. We give the variable typed to the To number block. On the dashboard we draw a terminal and give it the variable typed. We add a label and give it the variable result. When you finish, the app takes you straight to the next tutorial in the path. ...

Drive a two-motor car from a dashboard joystick, with one function per direction. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We declare motor1 on pins 2, 3 and 4. We declare motor2 on pins 5, 6 and 7. We create the functions forward and back. And the functions right, left and stop. In the forward canvas motor1 goes at speed 50. And motor2 goes at 50 too, so the car moves forward. In the back canvas motor1 goes at speed -50. And motor2 at -50 as well, so the car reverses. In the right canvas motor1 goes at speed 50. And motor2 goes at -50, the opposite way, so the car turns. In the left canvas motor1 goes at speed -50. And motor2 at 50, the opposite way, so it turns the other side. And in the stop canvas both go at speed 0. On the dashboard we draw a joystick. Pressing up calls forward. Pressing down calls back. Pressing right calls right. Pressing left calls left. Releasing up calls stop, so the car does not run away. Releasing down calls stop too. Releasing right calls stop. And releasing left calls stop as well. When you finish, the app takes you straight to the next tutorial in the path. ...

Read a potentiometer on an analog pin and draw its value on the dashboard chart. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create a number variable called reading. We declare a potentiometer called pot on analog pin 0. Inside the loop we set reading to what the pot measures. On the dashboard we draw a chart and give it the variable reading. When you finish, the app takes you straight to the next tutorial in the path. ...

Join two texts read from the terminal into a single one. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create the text variables terminal, first, last and result. And two more text variables, last and result. Above the loop we clear the terminal with an empty Set. Behind it we read the first name with Wait. And behind that we read the last name the same way. Behind it we set result to the variable first. And we join the last name behind it. When you finish, the app takes you straight to the next tutorial in the path. ...

Compare what the player types against a secret number and say when they get it. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create a text variable called message. We create a number variable called guess. Inside the loop we set guess to whatever is typed, using Wait. We add an If with a comparison in its condition. We compare the variable guess against the secret number 7. If they get it, we write You got it into message. On the dashboard we draw a terminal and give it the variable message. When you finish, the app takes you straight to the next tutorial in the path. ...

Set the speed of a motor from the dashboard with a slider. This tutorial is part of the Nairda learning path. You can build it step by step inside the app, which checks every block you place before letting you move on. The steps We add a While loop, which repeats forever. We create a number variable called reading. We declare a motor on pins 2, 3 and 4. Inside the loop we put the motor and give it the variable reading. On the dashboard we draw a slider. And we give the slider the variable reading. When you finish, the app takes you straight to the next tutorial in the path. ...