Explain the factors you will keep in mind while developing or writing a computer program.

Answer 1

Dont forget ;

Answer 2

Adding to @Babak and @Luka, I test program behaviour when invalid inputs are fed to it.

Answer 3

first, easy to read.
second, easy to modify.
third, easy to maintain.
forth, less vulnerable.
fifth, more portable.

but, on top of all that, solving a specific problem in less time and resources but with a high performance and clarity .

Answer 4

Syntax....