Summary

A broad overview of the options available to convert between strings and the two time data types was given in this chapter. The strptime command is used to convert a string into a POSIXlt variable. The strftime command is used to convert a time data type into a string. Finally, the basic operators used to perform arithmetic operations between two time variables was discussed, with an emphasis on using the difftime command. We also explored the use of the difftime data type.