How to Check if String contains only Alphabets in Kotlin

How to Check if String contains only Alphabets in Kotlin ?

Answer

To check if a string contains only alphabets in Kotlin, you can use the all function with a predicate that checks if each character is an alphabet.

✐ Examples

1 Check if String contains only Alphabets using all function

In this example,

We create a string named str1 with a value of "HelloWorld".
We use the all function with a predicate that checks if each character is an alphabet using Char::isLetter.
The all function returns true if all characters pass the predicate, otherwise false.
Finally, we print the result to the console.

Kotlin Program

fun main() {
    val str1 = "HelloWorld"
    val containsOnlyAlphabets = str1.all { it.isLetter() }
    println("String contains only alphabets: $containsOnlyAlphabets")
}

Output

String contains only alphabets: true

2 Check if String contains only Alphabets using all function (with non-alphabet characters)

In this example,

We create a string named str2 with a value of "Hello123".
We use the all function with a predicate that checks if each character is an alphabet using Char::isLetter.
The all function returns true if all characters pass the predicate, otherwise false.
Finally, we print the result to the console.

Kotlin Program

fun main() {
    val str2 = "Hello123"
    val containsOnlyAlphabets = str2.all { it.isLetter() }
    println("String contains only alphabets: $containsOnlyAlphabets")
}

Output

String contains only alphabets: false

Summary

In this tutorial, we learned How to Check if String contains only Alphabets in Kotlin language with well detailed examples.

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How to Check if String contains only Alphabets in Kotlin

How to Check if String contains only Alphabets in Kotlin ?

Answer

✐ Examples

1 Check if String contains only Alphabets using all function

Kotlin Program

Output

2 Check if String contains only Alphabets using all function (with non-alphabet characters)

Kotlin Program

Output

Summary

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