<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title>Arduino - Println </title> <link rel='stylesheet' href='arduino.css' type='text/css' /> <meta name="verify-v1" content="TtxFIEJAB6zdJ509wLxjnapQzKAMNm9u0Wj4ho6wxIY=" /> </head> <body> <div id="page"> <!--PageHeaderFmt--> <div id="pageheader"> <div class="title"><a href="http://www.arduino.cc"/>Arduino</a></div> <div class="search"> <!-- SiteSearch Google --> <FORM method=GET action="http://www.google.com/search"> <input type=hidden name=ie value=UTF-8> <input type=hidden name=oe value=UTF-8> <INPUT TYPE=text name=q size=25 maxlength=255 value=""> <INPUT type=submit name=btnG VALUE="search"> <input type=hidden name=domains value="http://www.arduino.cc/"> <input type=hidden name=sitesearch value="http://www.arduino.cc/"> </FORM> <!-- SiteSearch Google --> </div> </div> <!--/PageHeaderFmt--> <!--PageLeftFmt--> <div id="pagenav" style="text-align: right"> <div style="float: left;"> <p><a class='wikilink' href='http://arduino.cc/en/Main/Buy'>Buy</a> | <a class='wikilink' href='http://arduino.cc/en/Main/Software'>Download</a> | <a class='wikilink' href='Guide_index.html'>Getting Started</a> | <a class='wikilink' href='http://arduino.cc/en/Tutorial/HomePage'>Learning</a> | <a class='wikilink' href='index.html'>Reference</a> | <a class='wikilink' href='http://arduino.cc/en/Main/Hardware'>Hardware</a> | <a class='wikilink' href='FAQ.html'>FAQ</a> </p> <p class='vspace'></p> </div> <a class="urllink" href="http://www.arduino.cc/blog/" rel="nofollow">Blog »</a> | <a class="urllink" href="http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl" rel="nofollow">Forum »</a> | <a class="urllink" href="http://www.arduino.cc/playground/" rel="nofollow">Playground »</a> </div> <!--/PageLeftFmt--> <div id="pagetext"> <!--PageText--> <div id='wikitext'> <h2>Serial.println(data)</h2> <h4>Description</h4> <p>Prints a data to the serial port, 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 <a class='wikilink' href='Serial_Print.html'>Serial.print</a>(): </p> <p class='vspace'></p><p><strong>Serial.println(b)</strong> prints b as a decimal number in an ASCII string followed by a carriage return and a linefeed. </p> <p class='vspace'></p><p><strong>Serial.println(b, DEC)</strong> prints b as a decimal number in an ASCII string followed by a carriage return and a linefeed. </p> <p class='vspace'></p><p><strong>Serial.println(b, HEX)</strong> prints b as a hexadecimal number in an ASCII string followed by a carriage return and a linefeed. </p> <p class='vspace'></p><p><strong>Serial.println(b, OCT)</strong> prints b as an octal number in an ASCII string followed by a carriage return and a linefeed. </p> <p class='vspace'></p><p><strong>Serial.println(b, BIN)</strong> prints b as a binary number in an ASCII string followed by a carriage return and a linefeed. </p> <p class='vspace'></p><p><strong>Serial.print(b, BYTE)</strong> prints b as a single byte followed by a carriage return and a linefeed. </p> <p class='vspace'></p><p><strong>Serial.println(str)</strong> if str is a string or an array of chars, prints str an ASCII string. </p> <p class='vspace'></p><p><strong>Serial.println()</strong> just prints a carriage return and a linefeed. </p> <p class='vspace'></p><h4>Parameter</h4> <p>data types: integer types, including char, strings (char arrays) & floats<br />Printing of floats is supported with a precision of two places to the right of the decimal point.<br />This may change soon. </p> <p class='vspace'></p><h4>Returns</h4> <p>None </p> <p class='vspace'></p><h4>Example:</h4> <pre> /* 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 Serial.println(analogValue, BYTE); // print as a raw byte value // delay 10 milliseconds before the next reading: delay(10); } </pre> <p class='vspace'></p><h4>Programming Tip / Known Issues</h4> <p>see <a class='wikilink' href='Serial_Print.html'>Serial.print</a> </p> <p class='vspace'></p><h4>See also</h4> <ul><li><a class='wikilink' href='ASCIIchart.html'>ASCII chart</a> </li><li><a class='wikilink' href='Serial_Begin.html'>Serial.begin</a>(speed) </li><li><a class='wikilink' href='Serial_Available.html'>Serial.available</a>() </li><li><a class='wikilink' href='Serial_Read.html'>Serial.read</a>() </li><li><a class='wikilink' href='Serial_Print.html'>Serial.print</a>(data) </li></ul><p class='vspace'></p><p><a class='wikilink' href='index.html'>Reference Home</a> </p> </div> </div> <!--PageFooterFmt--> <div id="pagefooter"> <a href='Serial_Println?action=edit.html'>Edit Page</a> | <a href='Serial_Println?action=diff.html'>Page History</a> | <a href='Serial_Println?action=print.html' target='_blank'>Printable View</a> | <a href='http://arduino.cc/en/Site/AllRecentChanges'>All Recent Site Changes</a> </div> <!--/PageFooterFmt--> </div> </body> </html>