Whats does this code do?

Using Arduino Programming Questions
1

Hello,

i am new to aduino and programming and i do not understand what this part of the code do?

Serial.println(mpu.testConnection() ? F("MPU6050 connection successful") : F("MPU6050 connection failed"));

What is the ? operator, i try to search on google but i can not find it, maybe i searched wrong or do not know the right pronouncing of the operators.
the same with the : operator.
Serial.Println is clear to me

maybe someone is so nice and would explain the code part and the operators or how to search on google.

background, i want to know if the connection was sucessful and based on this an if statement.

Will this work:

if (mpu.testConnection()== TRUE) {
  //do something
}

Or do i have to write:

if (mpu.testConnection()== F("MPU6050 connection successful") {
  //do something
}

Thanks and nice day

2

It's an inline if-statement, basically.

To write it out:


if (mp.testConnection())
{
  Serial.println(F("MPU6050 connection successful"));
}
else
{
  Serial.println(F("MPU6050 connection failed"));
}

This does exactly the same.

Yes.

No, that doesn't make sense.

3

keep in mind the outcome variants should be the same type

4

Thanks, for your answer!!!!

5

Oh perfect, nice link.
Thanks, i could not find it, now it's clear.

Thx

6

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