How to Trim a String in Kotlin - Step by Step Examples

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How to Trim a String in Kotlin ?

Answer

To trim a string in Kotlin, you can use the trim(), trimStart(), and trimEnd() methods of the String class.

✐ Examples

1 Trimming " Hello World "

In this example,

We create a string named str1 with a value of " Hello World ".
We then use the trim() method on str1 to remove leading and trailing whitespace characters.
Finally, we print the trimmed string.

Kotlin Program

fun main(args: Array<String>) {
    val str1 = "   Hello World   ";
    val trimmedStr1 = str1.trim()
    print("Trimmed string is: '$trimmedStr1'");
}

Output

Trimmed string is: 'Hello World'

2 Trimming leading whitespace from " apple"

In this example,

We create a string named str2 with a value of " apple".
We then use the trimStart() method on str2 to remove leading whitespace characters.
Finally, we print the trimmed string.

Kotlin Program

fun main(args: Array<String>) {
    val str2 = "   apple";
    val trimmedStr2 = str2.trimStart()
    print("Trimmed string is: '$trimmedStr2'");
}

Output

Trimmed string is: 'apple'

3 Trimming trailing whitespace from "banana "

In this example,

We create a string named str3 with a value of "banana ".
We then use the trimEnd() method on str3 to remove trailing whitespace characters.
Finally, we print the trimmed string.

Kotlin Program

fun main(args: Array<String>) {
    val str3 = "banana   ";
    val trimmedStr3 = str3.trimEnd()
    print("Trimmed string is: '$trimmedStr3'");
}

Output

Trimmed string is: 'banana'

Summary

In this tutorial, we learned How to Trim a String in Kotlin language with well detailed examples.

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