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Hello Egoing @ #1

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JuHyun419 Oct 20, 2019
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JuHyun419 Oct 20, 2019
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JuHyun419 Oct 20, 2019
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8 changes: 7 additions & 1 deletion Data_and_operation/Number.java
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Original file line number Diff line number Diff line change
Expand Up @@ -9,7 +9,13 @@ public static void main(String[] args) {
System.out.println(6 / 2); // 3

System.out.println(Math.PI); // 3.141592653589793
System.out.println(Math.floor(Math.PI));

// floor = remove decimal point
// 3.141592653589793 -> 3.0 print
System.out.println(Math.floor(Math.PI));

// ceil = a decimal ascent
// 3.141592653589793 -> 4.0 print
System.out.println(Math.ceil(Math.PI));


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6 changes: 3 additions & 3 deletions HelloWorld_IOT/HelloWorldRaspberryPi.java
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Expand Up @@ -16,9 +16,9 @@ public static void main(String[] args) throws InterruptedException {

while (true) {
// H
pin.high();
Thread.sleep(SHORT_INTERVAL);
pin.low();
pin.high(); // pin LED ON
Thread.sleep(SHORT_INTERVAL); // 0.2 Seconds Stop
pin.low(); // pin LED OFF
Thread.sleep(SHORT_INTERVAL);
pin.high();
Thread.sleep(SHORT_INTERVAL);
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