Datatype Conversion.

It is sometimes beneficial to convert a value from one type of data to another. Each of the conversion functions converts its parameter to an equivalent representation within its datatype. The conversion functions include int(), float(), char(), byte(), and others.

char c;    // Chars are used for storing typographic symbols
float f;   // Floats are decimal numbers
int i;     // Ints are values between -32,768 and 32.767
byte b;    // Bytes are values between 0 and 255

void setup()
{
  c = 'A';
  f = float(c);     // Sets f = 65.0
  i = int(f * 1.4); // Sets i to 91
  b = (c / 2);  // Sets b to 32
  Serial.begin(9600);
  Serial.println(c);
  Serial.println(f);
  Serial.println(i);
  Serial.println(b, DEC);
}

void loop()
{

}