C code - 7 lines

Link:

C, pasted on Sep 3:

//\
/*
main(){puts/*/alert/**/("This program wasn't written in "//\
+"Javascript"+/*
"C"/**/", it was built for "//\
+"C!")/*
"Javascript!");}/**/

Output:

1
2
3

This program wasn't written in C, it was built for Javascript!

Exited: ExitFailure 63