# create a variable to hold the text message = "Hello World" # print the text stored in the variable print(message) 在前面的代码中,我向我们的hello_world.py程序添加了两行注释。我还添加了一个空行来帮助使代码更容易阅读。如果您保存并运行这个程序,您将得到与之前完
result = value1 + value2; result = value1 - value2; result = value1 * value2; result = value1 / value2; Parameters: value1: 任何常量或者变量,value2: 任何常量或者变量 编程小提示 整型常量的默认值是 int 类型,所以一些整型常量(定义中)的计算会导致溢出.(比如: 60 * 1000 会得 到一个负...
int ledPin = 9; // LED connected to digital pin 9 int analogPin = 3; // potentiometer connected to analog pin 3 int val = 0; // variable to store the read value void setup() { pinMode(ledPin, OUTPUT); // sets the pin as output } void loop() { val = analogRead(analogPin)...
result = value1 + value2; result = value1 - value2; result = value1 * value2; result = value1 / value2; value1: 任何常量或者变量,value2: 任何常量或者变量 但是要注意,互相做运算的变量或是常得是同一类型,不是的话先转换成同一类型 编程小提示 整型常量的默认值是int类型,所以一些整型常量(...
// to print first value of count_presses which is 0 Serial.println(count_presses); } void loop() { // read the button input pin: int button_state = digitalRead(button); // check state of a button, check for digital ones when button is pressed, and count them ...
() || gps.date.isValid() || gps.time.isValid()) { displayGPSInfo(); latitude = gps.location.lat(); longitude = gps.location.lng(); location = {latitude,longitude}; } } } /* Since Led is READ_WRITE variable, onLedChange() is executed every time a new value is received from ...
//read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton Serial.println(sensorVal); // Keep in mind the pullup means the pushbutton's // logic is inverted. It goes HIGH when it's open, ...
Serial.print("moving servo to "); //DEC:十进制形式输出 b 的 ASCII 编码值,并同时跟随一个回车和换行符 Serial.print(val,DEC); Serial.println(); for(int i=0;i<=50;i++) //给予舵机足够的时间让它转到指定角度 { servopulse(servopin,val);//引用脉冲函数 ...
Serial.print(" ac voltage ") ;// this gives name “ac voltage” to the printed analog valueSerial.print(n) ;// this simply prints the ac voltage value int m;// initialise variable m float n;//initialise variable n void setup() ...
int sensorValue; // an integer variable to store the potentiometer reading void setup() { // this function runs once when the sketch starts up pinMode (ledPin, OUTPUT); // initialize serial communication : Serial.begin(9600); } void loop() { // this loop runs repeatedly after setup()...