Returns a string of a number and appends a leading zero to single digit numbers.
function doubleDigit(n: number)
// Example:
doubleDigit(9) //=> "09"
doubleDigit(15) //=> "15"
Returns a string of a number and appends a leading zero to single digit numbers.
function doubleDigit(n: number)
// Example:
doubleDigit(9) //=> "09"
doubleDigit(15) //=> "15"