Numerical values can be specified along with their units. As of now, the only units supported are degree, arcmin, arcsec, hours, minute, and seconds. These can be specified by appending 'd', ''', '"', 'h', 'm', 's' respectively to the numeric values. Internally, all numeric values are always stored in the MKS system of units. The default units for a variable used to specify angles or time is radians. If the values are specified along with any of the above mentioned units, the values are still stored internally as radians. However while printing (see Section Print statement), the values are formatted automatically and printed with the appropriate units.