unsigned long

[Data Types]

描述

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);
}

語法

unsigned long var = val;

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

參考

• [程式語法] byte
• [程式語法] int
• [程式語法] unsigned int
• [程式語法] long
• [程式語法] Variable Declaration

語法參考主頁面

86Duino 參考的文本是根據 Creative Commons Attribution-ShareAlike 3.0 License，部分文本是從 the Arduino reference 修改的。 參考中的代碼示例已發佈到公共領域。