Reference.UnsignedLong History

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June 25, 2009, at 01:04 PM by Paul Badger -
Changed lines 41-42 from:
to:
  • Variable Declaration

July 17, 2007, at 08:22 PM by David A. Mellis -
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long time;

to:

unsigned long time;

April 17, 2007, at 12:10 AM by David A. Mellis -
Changed lines 26-27 from:
    long var = val;
to:
    unsigned long var = val;
April 17, 2007, at 12:06 AM by David A. Mellis -
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Parameters

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Syntax

Added line 36:
April 16, 2007, at 11:22 PM by Paul Badger -
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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

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);
}

Parameters

    long var = val;

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

See Also

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