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isDigit()
Description
Check if a character is a digit (that is a number) or not. Returns true if the character is a number.
Syntax
isDigit(thisChar)
Parameter Values
- thisChar: variable. Allowed data types: char.
Return Values
- true: If thisChar is a number.
- false: Otherwise
Example Code
if (isDigit(myChar)) { // tests if myChar is a digit
Serial.println("The character is a number");
}
else {
Serial.println("The character is not a number");
}
The result in Serial Monitor:
COM6
Autoscroll
Clear output
9600 baud
Newline
See Also
- Language : isAlpha()
- Language : isAlphaNumeric()
- Language : isAscii()
- Language : isControl()
- Language : isGraph()
- Language : isHexadecimalDigit()
- Language : isLowerCase()
- Language : isPrintable()
- Language : isPunct()
- Language : isSpace()
- Language : isUpperCase()
- Language : isWhitespace()
- Language : char
- Language : if (conditional operators)
- Language : while (conditional operators)
- Language : read()
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