Char
来自YFRobotwiki
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char() 描述 Converts a value to the char data type. --
语法 return; return value; // both forms are valid
value: any variable or constant type
A function to compare a sensor input to a threshold
int checkSensor(){
if (analogRead(0) > 400) {
return 1;
else{
return 0;
}
}
The return keyword is handy to test a section of code without having to "comment out" large sections of possibly buggy code.
void loop(){
// brilliant code idea to test here
return;
// the rest of a dysfunctional sketch here
// this code will never be executed
}
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