Which is best :define variables as global or pass them as arguments?

Hello everyone, I would like to know which is best: To define variables global in main & function like global var1, var2 or pass then as arguments to function like [out1]=functionName(var1,var2)

Answer 1

[Azzi Abdelmalek]

Passing them as argument is better

Answer 2

[Image Analyst]

FAQ: http://matlab.wikia.com/wiki/FAQ#Are_global_variables_bad.3F