unsigned long

[Data Types]

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 Code

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 unsigned long variable name
val – the value you assign to that variable

See also

• [Language] byte
• [Language] int
• [Language] unsigned int
• [Language] long
• [Language] Variable Declaration

Language Reference Home

The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.