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).

Syntax

unsigned long var = val;

Parameters

• var: variable name
• val: the value you assign to that variable

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);
    }

See also

• Integer Constants