String.startsWith()

설명

스트링이 다른 스트링의 문자들로 시작하는지 아닌지 테스트

문법

myString.startsWith(myString2)

매개변수

  • myString, myString2: a variable of type String

반환값

  • myStringmyString2의 문자들로 시작하면 true를, 아니라면 false를 반환합니다

예제 코드

void setup() { Serial.begin(9600); String myString = "ArduinoGetStarted.com"; String myString2 = "Arduino"; if (myString.startsWith(myString2)) Serial.println("The string is started with Arduino"); else Serial.println("The string is NOT started with Arduino"); } void loop() { }

시리얼 모니터에 결과:

Newbiely | Arduino IDE 2.3.8
──
File
Edit
Sketch
Tools
Help
Arduino Uno
Newbiely.ino
···
8 Serial.println("Hello World!");
Output
Serial Monitor
Message (Enter to send message to 'Arduino Uno' on 'COM15')
New Line
9600 baud
The string is started with Arduino
Ln 11, Col 1
Arduino Uno on COM15
2

※ 주의 및 경고:

If the string is modified, it is highly recommended using String.reserve() to prevent the memory fragmentation issue

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