Is Digit

Determine if the given character is a digit or not.

Example

• For symbol = '0', the output should be

  is_digit(symbol) = true

• For symbol = '-', the output should be

  is_digit(symbol) = false

Input/Output

• [input] char symbol

  A character which is either a digit or not.

  Guaranteed constraints:Given symbol is from ASCII table.

Solution

PYTHON

def is_digit(symbol):
    return symbol.isdigit()


print(is_digit('-'))

JAVASCRIPT

// read the python version of this snippet from this folder
// and convert it to javascript

function isDigit(symbol) {
  return !isNaN(symbol);
}