module.exports = function isinf(x) {
  //      discuss at: https://locutus.io/python/isinf/
  // parity verified: Python 3.12
  //     original by: Kevin van Zonneveld (https://kvz.io)
  //          note 1: Returns True if x is positive or negative infinity
  //       example 1: isinf(Infinity)
  //       returns 1: true
  //       example 2: isinf(-Infinity)
  //       returns 2: true
  //       example 3: isinf(42)
  //       returns 3: false

  return x === Infinity || x === -Infinity
}