Arduino

Buy | Download | Getting Started | Learning | Reference | Hardware | FAQ

Blog » | Forum » | Playground »

Reference Language | Libraries | Comparison | Changes

## unsigned long

#### Description

Unsigned long variables are extended size variables for number storage, and store 32 bits (4 bytes). Unlike standard longs unsigned longs won't store negative numbers, making their range from 0 to 4,294,967,295 (2^32 - 1).

#### Example

    unsigned long time;

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

    void loop()
    {
      Serial.print("Time: ");
      time = millis();
      //prints time since program started
      Serial.println(time);
      // wait a second so as not to send massive amounts of data
      delay(1000);
    }

#### Syntax

        unsigned long var = val;

- var - your long variable name
- val - the value you assign to that variable

#### See Also

- byte
- int
- unsigned int
- long
- Variable Declaration

Reference Home

Corrections, suggestions, and new documentation should be posted to the Forum.

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

Share|
Edit Page | Page History | Printable View | All Recent Site Changes