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

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How to Trim a String in Swift ?

Answer

To trim a string in Swift, you can use the trimmingCharacters(in:) method of the String class.

✐ Examples

1 Trimming " Hello World "

In this example,

We declare a variable named str1 with a value of " Hello World ".
We then use the trimmingCharacters(in:) method on str1 with the .whitespaces option to remove leading and trailing whitespace characters.
Finally, we print the trimmed string.

Swift Program

import Foundation

let str1 = "   Hello World   "
let trimmedStr1 = str1.trimmingCharacters(in: .whitespaces)
print("Trimmed string is: '\(trimmedStr1)'")

Output

Trimmed string is: 'Hello World'

2 Trimming leading whitespace from " apple"

In this example,

We declare a variable named str2 with a value of " apple".
We then use the trimmingCharacters(in:) method on str2 with the .whitespaces option to remove leading whitespace characters.
Finally, we print the trimmed string.

Swift Program

import Foundation

let str2 = "   apple"
let trimmedStr2 = str2.trimmingCharacters(in: .whitespaces)
print("Trimmed string is: '\(trimmedStr2)'")

Output

Trimmed string is: 'apple'

3 Trimming trailing whitespace from "banana "

In this example,

We declare a variable named str3 with a value of "banana ".
We then use the trimmingCharacters(in:) method on str3 with the .whitespaces option to remove trailing whitespace characters.
Finally, we print the trimmed string.

Swift Program

import Foundation

let str3 = "banana   "
let trimmedStr3 = str3.trimmingCharacters(in: .whitespaces)
print("Trimmed string is: '\(trimmedStr3)'")

Output

Trimmed string is: 'banana'

Summary

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

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