c# switch
scale = exponent switch
{
int n when (n >= 6 && n < 9) => "Million",
int n when (n >= 9 && n < 12) => "Billion",
int n when (n >= 12 && n < 15) => "Trillion",
int n when (n >= 15 && n < 18) => "Quadrillion",
int n when (n >= 18 && n < 21) => "Quintillion",
int n when (n >= 21 && n < 24) => "Sextillion",
int n when (n >= 24 && n < 27) => "Septillion",
int n when (n >= 27 && n < 30) => "Octillion",
30 => "Nonillion",
_ => "",
};