Why can i not have a decimal delay time?

Using Arduino Programming Questions
1

Hi, I am using an Arduino Uno with a simple circuit, where pin 9 is connected to a buzzer and then to the ground. I have the following script to make it sound:

const float c = 0.26163;

void setup() {
pinMode(9,OUTPUT);
}

void loop() {
play(1.5);
}

void play(double pitch) {
digitalWrite(9,HIGH);
delay(pitch);
digitalWrite(9,LOW);
delay(pitch);
}

If i play with pitch as 1.5ms, it makes the exact same pitch as 1ms, can someone explain why, and how i would fix this?

Thanks!

2

delay() only accepts an integer parameter. Read the documentation.

3

okay, is there perhaps a way i can deal with smaller units?
Also, why did it not error, and just round down instead?

4

delayMicroseconds() may help ;p

The float was converted to an integer type. The decimal is effectively chopped off.

5

You could probably achieve something like what you're trying to do with delayMicroseconds(). But you have to do some math.

6

thanks, this will work.

7

By the way, there are no scripts in C++. Only source code. Also, decimal only means base 10. Not trailing decimals.