## Python 2, 29 bytes <!-- language-all: lang-python --> a=input() while 1:print a;1/a This terminates with error on `0`, which is [allowed by default][1] as long as it produces no stray output to STDOUT, but I'll remove this if you think it goes against the spirit of the challenge. [1]: http://meta.codegolf.stackexchange.com/a/4781/20260