Swift String contains()

In this tutorial, you will learn about the Swift contains() method with the help of examples.

The contains() method checks whether the specified string (sequence of characters) is present in the string or not.


var message = "This is Swift Programming"

// check if message contains "Swift" var result = message.contains("Swift")
print(result) // Output: true

contains() Syntax

The syntax of the String contains() method is:

string.contains(char: charSequence)

Here, string is an object of the String class.

contains() Parameters

The contains() method takes a single parameter.

  • char (charSequence) - a sequence of characters

Note: A charSequence is a sequence of characters such as String.

contains() Return Values

contains() returns

  • true - if the string contains the specified character sequence
  • false - if the string doesn't contain the specified character sequence

Example 1: Swift String contains()

var message = "Swift Programming Language"

// check if message contains "Swift"
var result = message.contains("Swift")
print(result) // true // check if message contains "Java"
result = message.contains("Java")
print(result) // false // check if message contains " "
result = message.contains(" ");
print(result) // true



Here, message.contains(" ") returns true because the empty string is a subset of every other string.

Example 2: Using contains() With if...else

var message  = "Swift Programming Language"
var msg1 = "Swift"
var msg2 = "swift"
// true because message contains "Swift" if (message.contains(msg1)) {
print(message + " contains " + msg1) } else { print(message + " doesn't contain " + msg1) }
// contains() is case-sensitive // false because message doesn't contains "swift" if (message.contains(msg2)) {
print(message + " contains " + msg2) } else { print(message + " doesn't contain " + msg2) }


Swift Programming Language contains Swift
Swift Programming Language doesn't contain swift
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