# FAQ: Data Types & Variables - Declaring a Mutable Variable

This community-built FAQ covers the “Declaring a Mutable Variable” exercise from the lesson “Data Types & Variables”.

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## FAQs on the exercise Declaring a Mutable Variable

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main() {

var band = “Christine and the Queens”

println(song)

val songDuration = 3.5

println(songDuration)

var songchoice: Boolean = true

songchoice = true

}

Thanks so much!

You can take it like in the introduction its mentioned that if boolean value is true means u are able to identify the song choice , depending upon your choice of song if u are able to decide so true or if not so false so u can take it in a general manner respectively.
Tried my best to make it clear in a simple learning way