Not getting printout I expected from division

Projects Programming
1

This should be simple, but I'y stymied on it.

int interval=998000;
Frequency = ((float) 1000000/(float) interval);
Serial.print(Frequency);
Serial.println(" Hz")

The output is "1.00 Hz" Why am I only getting 2 decimal points here?

2

Because you didn't ask for any more.

3

int interval=998000;What is the largest number that a signed int can hold ?

4

AWOL:
Because you didn't ask for any more.

When printing the value, that is.

5

UKHeliBob:
int interval=998000;What is the largest number that a signed int can hold ?

It depends on the platform.

6

ltetzner:
This should be simple, but I'y stymied on it.

int interval=998000;

Frequency = ((float) 1000000/(float) interval);
Serial.print(Frequency);
Serial.println(" Hz")




The output is "1.00 Hz" Why am I only getting 2 decimal points here?

an int can only hold up to 32767, so interval should be an (unsigned) long or better as you are casting it to float make it a float.
Note that floats have only 7 significant digits in Arduino UNO land.

float interval=9.98e5;
Frequency = 1e6/ interval;
Serial.print(Frequency, 4);  // 4 decimals
Serial.println(" Hz")
7

AWOL:

UKHeliBob:
int interval=998000;What is the largest number that a signed int can hold ?

It depends on the platform.

True. But I am sure that you knew what I meant !

8

I did, but there was a clue that 1000000/ 14960 is nowhere 1. :wink: