Datasheet

Your Shield-Bot’s Brain • Chapter 1
Robotics with the BOE Shield-Bot • 25
One nice thing about variable types is that
Serial.println recognizes each type and
displays it correctly in the Serial Monitor. (Also, the C++ compiler in the Arduino software
requires all declared variables to have a type, so you can’t leave it out.)
Example Sketch – StoreRetrieveLocal
 Create a new sketch, and save it as StoreRetrieveLocal.
 Open or create and save the StoreRetrieveLocal sketch, and run it on your
Arduino.
 Open the Serial Monitor and verify that the values display correctly.
// Robotics with the BOE Shield - StoreRetrieveLocal
void setup()
{
Serial.begin(9600);
int a = 42;
char c = 'm';
float root2 = sqrt(2.0);
Serial.println(a);
Serial.println(c);
Serial.println(root2);
}
void loop()
{
// Empty, no repeating code.
}
ASCII stands for American Standard Code for Information Exchange. It’s a common code system
for representing computer keys and characters in displays. For example, the declaration char c
= 'm'
makes the Arduino store the number 109 in the c variable. Serial.println(c) makes
the Arduino send the number 109 to the Serial Monitor. When the Serial Monitor receives that
109, it automatically displays the letter m. See http://learn.parallax.com/ascii
for codes 1-127.
Serial.println(a);
Serial.println(c);
Serial.println(root2);