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## Serial.print(data)

#### Description

Prints data to the serial port.

#### Parameter

data: all integer types, including char; truncates floating point numbers to integers

#### Syntax

This command can take many forms:

Serial.print(b) with no format specified, prints b as a decimal number in an ASCII string. For example,

    int b = 79;
    Serial.print(b);

prints the ASCII string "79".

Serial.print(b, DEC) prints b as a decimal number in an ASCII string. For example,

    int b = 79;
    Serial.print(b, DEC);

prints the string "79".

Serial.print(b, HEX) prints b as a hexadecimal number in an ASCII string. For example,

    int b = 79;
    Serial.print(b, HEX);

prints the string "4F".

Serial.print(b, OCT) prints b as an octal number in an ASCII string. For example,

    int b = 79;
    Serial.print(b, OCT);

prints the string "117".

Serial.print(b, BIN) prints b as a binary number in an ASCII string. For example,

    int b = 79;
    Serial.print(b, BIN);

prints the string "1001111".

Serial.print(b, BYTE) prints b as a single byte. For example,

    int b = 79;
    Serial.print(b, BYTE);

returns the string "O", which is the ASII character represented by the value 79. See the ASCII table for more.

Serial.print(str) if str is a string or an array of chars, prints str an ASCII string. For example,

    Serial.print("Hello World!");

prints the string "Hello World!".

#### Parameters

b: the byte to print, or

str: the string to print

#### Returns

None

#### Example:

    /*
      Analog input

     reads an analog input on analog in 0, prints the value out.

     created 24 March 2006
     by Tom Igoe
     */

    int analogValue = 0;    // variable to hold the analog value

    void setup() {
      // open the serial port at 9600 bps:
      Serial.begin(9600);
    }

    void loop() {
      // read the analog input on pin 0:
      analogValue = analogRead(0);

      // print it out in many formats:
      Serial.print(analogValue);         // print as an ASCII-encoded decimal
      Serial.print("\t");                // print a tab character
      Serial.print(analogValue, DEC);    // print as an ASCII-encoded decimal
      Serial.print("\t");                // print a tab character
      Serial.print(analogValue, HEX);    // print as an ASCII-encoded hexadecimal
      Serial.print("\t");                // print a tab character
      Serial.print(analogValue, OCT);    // print as an ASCII-encoded octal
      Serial.print("\t");                // print a tab character
      Serial.print(analogValue, BIN);    // print as an ASCII-encoded binary
      Serial.print("\t");                // print a tab character
      Serial.print(analogValue/4, BYTE); // print as a raw byte value (divide the
                                         // value by 4 because analogRead() returns numbers
                                         // from 0 to 1023, but a byte can only hold values
                                         // up to 255)
      Serial.print("\t");                // print a tab character
      Serial.println();                  // print a linefeed character

      // delay 10 milliseconds before the next reading:
      delay(10);
    }

#### Programming Tip

Serial.print() truncates floats into integers, losing any fractional values. It is sometimes useful to multiply your float by a power of ten, to preserve some of this fractional resolution. Just remember to convert it back on the other end before your project is launched on the Hubble Space Telescope.

#### See also

- Serial.begin(speed)
- Serial.available()
- Serial.read()
- Serial.println(data)

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