Question

every program ends with a ______________
line of code that called end
task main()
closing curly brace
\stop\ command

Explanation:

In many programming languages like C, C++, Java etc., the main part of the program is enclosed in curly - braces and the program execution ends when the closing curly - brace of the main block is reached. There is no universal "END" line of code in most common languages, "task main()" is a start of a program in some specific programming environments for robotics etc. and there is no universal "Stop" command for ending a program in most languages.

Answer:

closing curly brace