Using Ranges in When
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Using Ranges in When in Kotlin
Kotlin lets you use ranges in a when expression to check if a value is within a specific sequence of numbers or characters. This makes your code cleaner and easier to read than using multiple comparisons.
What Is a Range?
A range in Kotlin is a sequence of values with a start and an end, such as 1..10 for numbers or 'a'..'z' for characters. You can use the in keyword to check if a value belongs to a range.
Why Use Ranges in When?
- Simplifies checking if a value is between two limits;
- Makes code more readable and concise;
- Reduces the need for multiple logical conditions.
Basic Syntax
when (value) {
in 1..10 -> println("Value is between 1 and 10")
!in 11..20 -> println("Value is not between 11 and 20")
else -> println("Value is something else")
}
Typical Use Cases
- Checking if a user's age is within a valid range;
- Grouping scores into letter grades;
- Validating if a character is a letter or digit.
Using ranges in when expressions helps you write safer, more expressive code when working with intervals.
Main.kt
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Using Ranges in When
Using Ranges in When in Kotlin
Kotlin lets you use ranges in a when expression to check if a value is within a specific sequence of numbers or characters. This makes your code cleaner and easier to read than using multiple comparisons.
What Is a Range?
A range in Kotlin is a sequence of values with a start and an end, such as 1..10 for numbers or 'a'..'z' for characters. You can use the in keyword to check if a value belongs to a range.
Why Use Ranges in When?
- Simplifies checking if a value is between two limits;
- Makes code more readable and concise;
- Reduces the need for multiple logical conditions.
Basic Syntax
when (value) {
in 1..10 -> println("Value is between 1 and 10")
!in 11..20 -> println("Value is not between 11 and 20")
else -> println("Value is something else")
}
Typical Use Cases
- Checking if a user's age is within a valid range;
- Grouping scores into letter grades;
- Validating if a character is a letter or digit.
Using ranges in when expressions helps you write safer, more expressive code when working with intervals.
Main.kt
フィードバックありがとうございます！
