Question about the comparison

Projects Programming
1 
void setup() {
  // put your setup code here, to run once:
 Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  if(Serial.available()){
    Serial.println(Serial.readString() =='stop');
  }

}

Why the output is always 1, no matter the content I typed in ? it should be 0 right, if the input is not stop.

2

Single quotes?
How does that work?

3

but if i changes to "", even the input is stop, the output is still 0.

4

Which?

What is the line ending setting on the serial monitor?

5

The result I am expected is that when I enter stop in the serial monitor, the value of Serial.readString() =='stop' should be zero.

6

Can you explain your expectations, please?

What is the line-ending setting in the serial monitor?
I think I may have already asked.

7

probably getting a newline in the string..
try..

Serial.println(Serial.readString() =="stop\n");

good luck.. ~q

1 Like
8

...but it won't be zero :wink:

1 Like
9

then maybe..

Serial.println(!Serial.readString() =="stop\n");

happy trails.. ~q

1 Like
10

It works, thanks you !

1 Like
11

...or you could take the hint, and change the line-ending setting in the serial monitor.

1 Like
12

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