break

설명

breakfor, while 또는 do...while loop 로부터 빠져나가 정상 루프를 건너 뛰는데 쓰인다. switch case 문으로부터 빠져나갈 때도 쓰인다.

예제 코드

Example with For Loop

예제 코드 1

The following code exits the for loop when the i greater than 3

void setup() { Serial.begin(9600); Serial.println("====== TEST START ======"); for (int i = 1; i < 1000; i++) { Serial.print("Inside the FOR loop: i = "); Serial.println(i); if(i > 3) break; } Serial.println("====== TEST END ========"); } void loop() {}

시리얼 모니터에 결과:

COM6
Send
====== TEST START ====== Inside the FOR loop: i = 1 Inside the FOR loop: i = 2 Inside the FOR loop: i = 3 ====== TEST END ========
Autoscroll Show timestamp
Clear output
9600 baud  
Newline  

예제 코드 2

아래 코드에서, 센서값이 임계값을 넘을 때 제어는 for 를 빠져나간다.

int threshold = 40; for (x = 0; x < 255; x++) { analogWrite(PWMpin, x); sens = analogRead(sensorPin); if (sens > threshold) { // bail out on sensor detect x = 0; break; } delay(50); }

Example with While Loop

The following code exits the while loop when the i greater than 3

void setup() { Serial.begin(9600); Serial.println("====== TEST START ======"); int i = 0; while (true) { // while(true) means loop forever Serial.print("Inside the WHILE loop: i = "); Serial.println(i); if(i > 3) break; i++; // increase i by 1 } Serial.println("====== TEST END ========"); } void loop() { }

시리얼 모니터에 결과:

COM6
Send
====== TEST START ====== Inside the WHILE loop: i = 0 Inside the WHILE loop: i = 1 Inside the WHILE loop: i = 2 Inside the WHILE loop: i = 3 ====== TEST END ========
Autoscroll Show timestamp
Clear output
9600 baud  
Newline  

Example with Do While Loop

The following code exits the while loop when the i greater than 3

void setup() { Serial.begin(9600); Serial.println("====== TEST START ======"); int i = 0; do { Serial.print("Inside the DO WHILE loop: i = "); Serial.println(i); if(i > 3) break; i++; // increase i by 1 } while (true); // while(true) means loop forever Serial.println("====== TEST END ========"); } void loop() { }

시리얼 모니터에 결과:

COM6
Send
====== TEST START ====== Inside the DO WHILE loop: i = 0 Inside the DO WHILE loop: i = 1 Inside the DO WHILE loop: i = 2 Inside the DO WHILE loop: i = 3 ====== TEST END ========
Autoscroll Show timestamp
Clear output
9600 baud  
Newline  

Example with Switch Case

See example in switch...case

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