What is the output of the following code?

num $=0$

sum $=0$

while $($ num $<mtext\; id="EditorElement\_865282"></mtext><mn\; id="EditorElement\_865283">4</mn><mi\; id="EditorElement\_865284">)</mi>$:

sum $=$ sum $+$ num

num $=$ num $+1$

print $($sum$)$

$6$

$0$

$2$

$4$