What goes first? && (AND) or || (OR)?

Logical AND && comes first to Logical OR ||.

Associativity of both these operators is left to right meaning if you encounter && operator twice or more, then first && operator in the order of appearance from left to right will be executed first. Similarly with ||.

e.g.,

<expression1> && <expression2> && <expression3>

Here ANDING between expression1 and expression2 is performed first and it's result is taken to AND with expression3.

Similarly goes to ||.

if ( p > 2 && r == 2 || j < 5 && k == 10 && m <= 3 || h >=2 || v < 17

Here p > 2 && r == 2 is performed first, let's say it results in x

j < 5 && k == 10 is performed second, let's say it results in y

y && m <= 3 is performed third, let's say it results in z

x || z is performed fourth, let's say it results in a

a || h >= 2 is performed fifth, let's say it results in b

finally b || v < 17 will be performed.

you might be interested in knowing the precedence and priorities of execution of other operators in c and their associativity.Following is the link.

I think it's right to left, not sure though. I think it goes:

v < 17? do something

h >= 2? do something

j < 5 && k == 10 && m <= 3? do something

p > 2 && r == 2? do something

else do something else.

I think it's order of appearance