["python","string","numbers","digits"]
in python how do I convert a single digit number into a double digits string?

So say I have a = 5 I want to print it as a string '05'
In python 3.6, the fstring or "formatted string literal" mechanism was introduced. f"{a:02}" is the equivalent of the .format format below, but a little bit more terse. python 3 before 3.6 prefers a somewhat more verbose formatting system: "{0:0=2d}".format(a) You can take shortcuts here, the above is probably the most verbose variant. The full documentation is available here: http://docs.python.org/3/library/string.html#string-formatting print "%02d"%a is the python 2 variant The relevant doc link for python2 is: http://docs.python.org/2/library/string.html#format-specification-mini-language