toStringWithParenthesis method
Prints the complex number with opening and closing parenthesis in case the complex number had both real and imaginary part.
Implementation
String toStringWithParenthesis() {
if (real == 0) {
return '${_fixZero(imaginary)}i';
}
if (imaginary == 0) {
return _fixZero(real);
}
return '($this)';
}