is 'else if correct statement?

Answer 1

yes. like this
If(condition)
{code to be executed}
else if(condtion)
{code to be executed}
else
{code to be executed}

Answer 2

It's all the same with different languages. Same logic but can be different syntax.

Answer 3

it also can be altered with switch.. same usage

Answer 4

yeah

Answer 5

yes

Answer 6

you may use 'elseif' or 'else if' statement

Answer 7

yes but it begin with if and end on else

"If(condition)
{code to be executed}
else if(condtion)
{code to be executed}
else
{code to be executed}
"