Hi Everyone,
I have a code in which I use two variable whose type is double. when I use the following code to print the double variable it works perfectly.
Serial.println(A, 6);
The out put is like 47.913459. But when I use the following code it just return the 47.91.
Serial.println(A);
The question is that how can I convert these variable to string with the full precision.
Many thanks in advance.
Mahdiyar
If you want to print with more than 2 places use the print(float, places) form.
Serial.print(pi, 5);
If you want to change a float to a string use dtostrf().
groundFungus:
If you want to print with more than 2 places use the print(float, places) form.Serial.print(pi, 5);If you want to change a float to a string use dtostrf().
Thank you.
I've tried it it is not working always fine. I have used it in the following code and the output is 39.123455 while it should be 39.123456.
void setup()
{
Serial.begin(9600);
double floatVal=39.123456;
char charVal[15]; //temporarily holds data from vals
String stringVal = ""; //data on buff is copied to this string
dtostrf(floatVal, 9, 6, charVal); //4 is mininum width, 4 is precision; float value is copied onto buff
//display character array
stringVal = String(charVal);
Serial.print("stringVal: ");Serial.println(stringVal); //display string
}
void loop()
{
}
I refer you to the reference on the float data type for Arduino. The float data type limited in precision.