isUpperCase()

Description

Check if a character is upper case (that is, a letter in upper case) or not. Returns true if the character is upper case.

Syntax

isUpperCase(thisChar)

Parameter Values

  • thisChar: variable. Allowed data types: char.

Return Values

  • true: If thisChar is upper case.
  • false: Otherwise

Example Code

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

The result in Serial Monitor:

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

See Also

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Arduino UNO R3
Arduino Starter Kit
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