Swift Program to Find Length of a String

1. Introduction

Finding the length of a string is a fundamental operation in many programming tasks. Swift provides a very intuitive way to determine the length of a string. In this tutorial, we'll explore how to find the length of a string in Swift.

2. Program Overview

The main steps we'll follow are:

1. Declare a string.

2. Use the count property of the string to get its length.

3. Print the length.

3. Code Program

// Declare a string
let sampleString = "Hello, Swift!"

// Find the length of the string
let lengthOfString = sampleString.count

// Print the length
print("The length of the string \"\(sampleString)\" is: \(lengthOfString)")

Output:

The length of the string "Hello, Swift!" is: 13

4. Step By Step Explanation

1. We declare a string named sampleString with the value "Hello, Swift!".

2. In Swift, the String type has a property named count which provides the number of characters in the string. We use this property to determine the length of sampleString and store it in the lengthOfString variable.

3. Finally, we print out the result using string interpolation.

It's important to note that the count property returns the number of characters in the string. If the string contains multi-character grapheme clusters (which are visually a single character but composed of multiple Unicode scalars), they are still counted as a single character by the count property.With this, we've successfully determined the length of a string in Swift!


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