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The simplest way to get more decimal places to print is this:

Serial.println(val,NUMBER_OF_DECMIAL_PLACES);

This will print out any number of digits after the decimal place. Regular print without the number of digits specified will default to 2 decimal places. for example, here is some code and the result that gets printed:

float val = 23.459;
Serial.println(val);
Serial.println(val, 4);
Serial.println(val, 10);

23.46

 

23.4590

 

23.4589996337

You may notice that with 10 decimal places printed you can start to see how much the actual value of 23.459 needs to be approximated to fit within a floating point number. This is similar to how 1/3 can not be represented 100% accurately in a finite number of decimal digits; 459/1000 cannot be represented 100% accurately in a finite number of binary bits, so it is approximated.

Also, note that for non-floating point numbers the optional second argument to print and println is the base it should be printed in (dec, hex, oct, ...) and has nothing to do with precision.

The simplest way to get more decimal places to print is this:

Serial.println(val,NUMBER_OF_DECMIAL_PLACES);

This will print out any number of digits after the decimal place. Regular print without the number of digits specified will default to 2 decimal places. for example, here is some code and the result that gets printed:

float val = 23.459;
Serial.println(val);
Serial.println(val, 4);
Serial.println(val, 10);

23.46

23.4590

23.4589996337

You may notice that with 10 decimal places printed you can start to see how much the actual value of 23.459 needs to be approximated to fit within a floating point number. This is similar to how 1/3 can not be represented 100% accurately in a finite number of decimal digits; 459/1000 cannot be represented 100% accurately in a finite number of binary bits, so it is approximated.

Also, note that for non-floating point numbers the optional second argument to print and println is the base it should be printed in (dec, hex, oct, ...) and has nothing to do with precision.

The simplest way to get more decimal places to print is this:

Serial.println(val,NUMBER_OF_DECMIAL_PLACES);

This will print out any number of digits after the decimal place. Regular print without the number of digits specified will default to 2 decimal places. for example, here is some code and the result that gets printed:

float val = 23.459;
Serial.println(val);
Serial.println(val, 4);
Serial.println(val, 10);

23.46

23.4590

23.4589996337

You may notice that with 10 decimal places printed you can start to see how much the actual value of 23.459 needs to be approximated to fit within a floating point number.

Also, note that for non-floating point numbers the optional second argument to print and println is the base it should be printed in (dec, hex, oct, ...) and has nothing to do with precision.

The simplest way to get more decimal places to print is this:

Serial.println(val,NUMBER_OF_DECMIAL_PLACES);

This will print out any number of digits after the decimal place. Regular print without the number of digits specified will default to 2 decimal places. for example, here is some code and the result that gets printed:

float val = 23.459;
Serial.println(val);
Serial.println(val, 4);
Serial.println(val, 10);

23.46

23.4590

23.4589996337

You may notice that with 10 decimal places printed you can start to see how much the actual value of 23.459 needs to be approximated to fit within a floating point number. This is similar to how 1/3 can not be represented 100% accurately in a finite number of decimal digits; 459/1000 cannot be represented 100% accurately in a finite number of binary bits, so it is approximated.

Also, note that for non-floating point numbers the optional second argument to print and println is the base it should be printed in (dec, hex, oct, ...) and has nothing to do with precision.

The simplest way to get more decmial places to print is this:

Serial.println(val,NUMBER_OF_DECMIAL_PLACES);

This will print out any number you specify of digits after the decmial place. Regular print without the number of digits specified will default to 2 decimal places. for example, here is some code and the result that gets printed:

float val = 23.459;
Serial.println(val);
Serial.println(val, 4);
Serial.println(val, 10);

23.46

23.4590

23.4589996337

You may notice that with 10 decimal places printed you can start to see how much the actual value of 23.459 needs to be approximated to fit within a floating point number.

Also, note that for non-floating point numbers the optional second argument to print and println is the base it should be printed in (dec, hex, oct, ...) and has nothing to do with precision.

The simplest way to get more decimal places to print is this:

Serial.println(val,NUMBER_OF_DECMIAL_PLACES);

This will print out any number of digits after the decimal place. Regular print without the number of digits specified will default to 2 decimal places. for example, here is some code and the result that gets printed:

float val = 23.459;
Serial.println(val);
Serial.println(val, 4);
Serial.println(val, 10);

23.46

23.4590

23.4589996337

You may notice that with 10 decimal places printed you can start to see how much the actual value of 23.459 needs to be approximated to fit within a floating point number.

Also, note that for non-floating point numbers the optional second argument to print and println is the base it should be printed in (dec, hex, oct, ...) and has nothing to do with precision.