# 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,您将得到与之前完全相同的输出。您还可以使用三重...
if 语句的语法是: if (someVariable > 50) { // 执行某些语句 } 本程序测试 someVariable 变量的值是否大于 50。当大于 50 时,执行一些语句。换句话说,只要 if 后面括号里的结果(称之为测试表达式)为真,则执行大括号中的语句(称之为执行语句块);若为假,则跳过大括号中的语句。if 语句后的大括号可以省...
if 语句的语法是: if(someVariable>50) { // 执行某些语句 } 本程序测试 someVariable 变量的值是否大于 50。当大于 50 时,执行一些语句。换句 话说,只要 if 后面括号里的结果(称之为测试表达式)为真,则执行大括号中的语句(称 之为执行语句块);若为假,则跳过大括号中的语句。 if 语句后的大括号可以省...
It's 3.25" x 2.2" / 8.3cm x 5.5cm with a standard double-strip in the middle and two power rails on both sides. You can pull the power rails off easily to make the breadboard as thin as 1.4" (3.5cm). You can also "snap" these breadboards together, either way, to make longer...
// variable for counting button presses int count_presses = 0; // two helper variables, for detecting one physical press int ones_count = 0; int real_press = 0; void setup() { // initialize serial communication at 9600 bits per second: ...
voidsetup(){floatmyFloat=1.1234;Serial.begin(9600);Serial.print(myFloat,2);}voidloop(){} Output: 1.12 In this Arduino code, we declare a floating-point variable namedmyFloatand assign it the value1.1234. Then, we initialize the serial communication with a baud rate of9600usingSerial.begin(...
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)...
printHeader(); //to start thread execution we need to call the enableThreadExecution function ThreadHandler::getInstance()->enableThreadExecution(); } void loop() { //next we need to print out the monitoring data // with some nice formating ...
(val, format) I参数:val:要发送的数据(任何数据类型)format:指定数字的基数(用于整型数)或者小数的位数(用于浮点数).返回值:<>size_t (long): print()返回发送的字节数(可丢弃该返回值).例如:/*IUses a FOR loop for data and prints a number in various formats.*/IIIIIint x = 0; / variable...
fix(usb): uninitilized variable warning message by @SuGlider in #11222 feat(usb): add a few more consumer control HID commands by @SuGlider in #11227 fix(usb_hid): duplicated CONSUMER_CONTROL_PLAY_PAUSE by @SuGlider in #11242 feat(logging): Arduino log redirection by @mathieucarbou in ...