isAlpha()

설명

문자가 알파벳인지를 판단합니다. thisChar가 알파벳이라면 참을 반환합니다.

문법

isAlpha(thisChar)

매개변수

  • thisChar: 변수. 혀용 자료형: char

반환값

  • thisChar가 알파벳이라면 true를, 아니라면 false를 반환합니다.

예제 코드

char myChar; void setup() { Serial.begin(9600); myChar = ' '; Serial.print(myChar); Serial.print(": "); if (isAlpha(myChar)) // tests if myChar is a letter Serial.println("The character is a letter"); else Serial.println("The character is not a letter"); myChar = 'A'; Serial.print(myChar); Serial.print(": "); if (isAlpha(myChar)) // tests if myChar is a letter Serial.println("The character is a letter"); else Serial.println("The character is not a letter"); } void loop() {}

The result in Serial Monitor:

COM6
Send
: The character is not a letter A: The character is a letter
Autoscroll Show timestamp
Clear output
9600 baud  
Newline  

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