void loop() { delay(100); if ( S1() ) digitalWrite(LED1, 1); else digitalWrite(LED1, 0); } Test 1 Note: true = 1; false = 0. Or should I say any value except 0 is TRUE. Note the code above. An "if" statement has the general form of: if (condition) light_led1; els...
Conditionals - If statement This example demonstrates the use of if() statements. It reads the state of a potentiometer (an analog input) and turns on an LED only if the potentiometer goes above a certain threshold level. It prints the analog value regardless of the level. The circuit: * ...
statement(s) } 条件语句 if (boolean expression) { statement(s) } else if (boolean expression) { statement(s) } else { statement(s) } 3.3 //(单行注释) Comments(注释) 注释用于提醒自己或他人程序是如何工作的。它们会被编译器忽略掉,也不会传送给处理器,不会执行,所以它们在Atmega芯片上不占用体...
The Arduino if else statement : Or how the Arduino makes decisions. Learn exactly how to write the "if else" code. Find out the different ways of using it - you don't always need the 'else' part. Find out the short way of writing 'if-else' (less brackets to write). learn about...
IfStatementConditional:通过for循环来控制多个LED灯 If声明条件:使用一个‘if 声明’,通过改变输入条件来改变输出条件 Switch Case:怎样在非连续的数值里选择。 Switch Case 2:第二个switch-case的例子,展示怎样根据在串口收到的字符来采取不同的行为 While 声明条件:当一个按键被读取,怎样用一个while循环来校准一...
if-else-ifstatement. Theifstatement Given below is the structure of anifstatement: If (conditional expression) { Body of the if statement } Theconditional expressioncan be anything that can result either in true or false. If the statement is true, the code in the body of the s...
if(booleanexpression) { statement(s) } elseif(booleanexpression) { statement(s) } else { statement(s) } 3.3 //(单行注释) Comments(注释) 注释用于提醒自己或他人程序是如何工作的。它们会被编译器忽略掉,也不会传送给处 理器,所以它们在 Atmega 芯片上不占用体积。注释的唯一作用就是使你自己理解或...
(s) } while (boolean expression); for (initialisation; termination condition; incrementing expr) { statement(s)} //条件语句 if (boolean expression){ statement(s) } else if (boolean expression) { statement(s) } else { statement(s) } 注释注释是程序中的一些行,用于让自己或他人认识程序的...
Ive got a few arduino projects going now where I need to keep my main loops running fast, This is a test to verify that a multiple IF statement finished if the primary statement is false. In example... if(A= =false && B== tru...
int i;scanf("%ld",i);if(i >0) {printf("That number was positive!"); }else{printf("That number was negative or zero!"); } } (3)switch语句 一般形式为: switch(int or char expression) {caseconstant expression1: statement1;break;/* optional */caseconstant expression2: statement2;break...