map() \ Language (API) \ Wiring 1.0 (ALPHA)

| Index

| Reference for Wiring 1.0 (ALPHA) 0017+. If you have a previous version, use the reference included with your software. If you see any errors or have any comments, let us know.

Name |  | ### map()
Examples |  |
    int value;
    int m;

    void setup() {
      Serial.begin(9600);
    }

    void loop() {
      value = analogRead(0);
      m = (int)map(value, 0, 1023, 0, 255); // converts a number in the range
      Serial.println(m, BYTE);              // 0-1023 to a number in the range 0-255
      delay(100);
    }
Description |  | out-of-range values are often intentional and useful.
Syntax |  |
    map(value, low1, high1, low2, high2)
Parameters |  |
value |  | float: The incoming value to be converted
low1 |  | float: Lower bound of the value's current range
high1 |  | float: Upper bound of the value's current range
low2 |  | float: Lower bound of the value's target range
high2 |  | float: Upper bound of the value's target range
Returns |  | float
Usage |  | Application