Serial.println()

[Serial]

Description

Prints data to the serial port as human-readable ASCII text followed by a carriage return character (ASCII 13, or ‘\r’) and a newline character (ASCII 10, or ‘\n’). This command takes the same forms as Serial.print().

Syntax

Serial.println(val)
Serial.println(val, format)

Parameters

  • val: the value to print – any data type
  • format: specifies the number base (for integral data types) or number of decimal places (for floating point types)

Returns

size_t (long): println() returns the number of bytes written, though reading that number is optional

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.println(analogValue);       // print as an ASCII-encoded decimal
  Serial.println(analogValue, DEC);  // print as an ASCII-encoded decimal
  Serial.println(analogValue, HEX);  // print as an ASCII-encoded hexadecimal
  Serial.println(analogValue, OCT);  // print as an ASCII-encoded octal
  Serial.println(analogValue, BIN);  // print as an ASCII-encoded binary
 
  // delay 10 milliseconds before the next reading:
  delay(10);
}

See also


Language Reference Home

The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.

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