How to write else if as logical statement?

I want to write an if-else statement as a logical statement. I know that:

if (statement1){
   b=c
}
else{
   b=d
}

can be written as:

b=(statement1 && c)||(!statement1 && d)

But how do I write the following if-else statements as logical?:

if (statement1){
   b=c
}
else if (statement2){
   b=d
}
else{
   b=e
}

I'm sorry if there is already a post about this. I have tried, but couldn't find anything similar to my problem.