expected unqualified-id before 'if' Code Answer's
Expected an ID to be given for the if condition before the statement that follows. If a block is not provided (with { ... }), an ID must be provided even if there is only one statement in the block.
expected unqualified-id before 'if'
By 
Misty Macaque
on May 12, 2020
Misty Macaque
on May 12, 2020
void loop(){
if(distanceCm < 21){
digitalWrite(13, HIGH);
}
else{
digitalWrite(13, LOW);
}
}Source: arduino.stackexchange.com
1
If a function is called without any arguments, it is said to be unqualified. This means that there are no arguments and the function takes no arguments. In contrast, if a function is called with an argument, it is said to be qualified.
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expected unqualified-id before 'if' expected initializer before 'isdigit'| expected number of trials to get n consecutive heads C++ expected a ')' Parse error. Expected a command name, got unquoted argument with text "//". 49 1 C:\Users\usuario\Documents\Placas.cpp [Error] expected '}' at end of input clear file before writing c++ & before function arg in cpp
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