Here why the "is there" string not get concatenate...

# getting-started

[Shreyas]

Here why the "is there" string not get concatenated?
Slack Conversation

[Joffrey]

Maybe the braces of the last else are considered to be a lambda expression due to the +.
This would make is there part of the else clause:

else ({ "C" } + " is there")

[Joffrey]

By the way, please don't post images of code. They are not searchable, and I can't run your example or modify it/make suggestions. You're already using the playground, so you can also share a playground link directly using the 🔗 Copy link button in the top right

[Gleb Minaev]

I think it's because
if (...) { ... } else if (...) { ... } else {...} + "..."
is equivalent to
if (...) { ... } else { if (...) { ... } else { ... } + "..."} .

[Gleb Minaev]

That's why the concatenation is applied only to one of the last two alternatives but not to one of the all three of them.

It' better to write

when {
    ... -> "..."
    ... -> "..."
    else -> "..."
} + "..."

[Shreyas]

Code:

fun main() {
val a = "b"
val b =
if(a == "a"){
"A"
} else if(a == "b"){
"B"
} else {
"C"
} + " is there"
println(b)
}

[Joffrey]

I think Gleb's right. It's probably just that the + applies to the last if expression, and you would need clarifying parentheses (or braces) in this case to make it concatenate with both `if`s. But as Gleb rightfully said, in that case it would be much better to use a when, because you really want to express a single thing with multiple conditions, not nested ifs.

[Klitos Kyriacou]

The problem is caused by our mental image of if ... else if ... else - as if else if was a thing. It isn't. It is in some other languages, such as Python (where it's written elif). But in Kotlin, there is no else if. It's just an else whose else-clause happens to start with an if.

[Joffrey]

@Shreyas in case it wasn't clear, here is another way to write your current if chain (with clarifying braces/parentheses):

if (a == "a") {
    "A"
} else {
    (if (a == "b") "B" else "C") + " is there"
}

This is probably not what you wanted to express.

[Ankur Patel]

fun main() {
    val a = "c"
    val b =
    	(if(a == "a"){
        	"A"
        } else if(a == "b"){
        	"B"
    	} else {
    		"C"
        }) + " is there"
    println(b)
}

This will works well with add the bracket for condition and the other string with + sign.