#include <Streaming.h>

void setup() {
    Serial.begin(115200);

    double f = 45.123456789;

    f = f*f;

    Serial << _DEC(f) << endl;

    char buffer[20];
    dtostrf(f,3,10,buffer); /* sprintf does not work with floats on Arduino */
    /* Outputs the full seven digits of precision from single-precision float f*/
    Serial.println(buffer);


//    for(byte b = 0; b < 20; b++){
//        Serial.write(buffer[b]);
//    }
//        Serial << endl;
}

void loop() {

}