# cf.Units.isdimensionless

`Units.``isdimensionless`

  True if the units are dimensionless, false otherwise.

  See also

  `islongitude`, `islatitude`, `ispressure`, `isreftime`, `istime`

  Examples: |

      >>> cf.Units('').isdimensionless
      True
      >>> cf.Units('1').isdimensionless
      True
      >>> cf.Units('100').isdimensionless
      True
      >>> cf.Units('m/m').isdimensionless
      True
      >>> cf.Units('m km-1').isdimensionless
      True
      >>> cf.Units().isdimensionless
      False
      >>> cf.Units('m').isdimensionless
      False
      >>> cf.Units('m/s').isdimensionless
      False
      >>> cf.Units('days since 2000-1-1', calendar='noleap').isdimensionless
      False