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Update kotlin-tour-null-safety.md #4120

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May 27, 2024
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Update kotlin-tour-null-safety.md #4120

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8 changes: 4 additions & 4 deletions docs/topics/tour/kotlin-tour-null-safety.md
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Original file line number Diff line number Diff line change
Expand Up @@ -77,7 +77,7 @@ fun describeString(maybeString: String?): String {
}

fun main() {
var nullString: String? = null
val nullString: String? = null
println(describeString(nullString))
// Empty or null string
}
Expand All @@ -96,7 +96,7 @@ In the following example, the `lengthString()` function uses a safe call to retu
fun lengthString(maybeString: String?): Int? = maybeString?.length

fun main() {
var nullString: String? = null
val nullString: String? = null
println(lengthString(nullString))
// null
}
Expand All @@ -119,7 +119,7 @@ is skipped and `null` is returned:

```kotlin
fun main() {
var nullString: String? = null
val nullString: String? = null
println(nullString?.uppercase())
// null
}
Expand All @@ -138,7 +138,7 @@ As a result, the Elvis operator returns `0`:

```kotlin
fun main() {
var nullString: String? = null
val nullString: String? = null
println(nullString?.length ?: 0)
// 0
}
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