The contains() method checks whether the specified string (sequence of characters) is present in the string or not.
Example
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()
Output
true false true
Here, message.contains(" ") returns true because the empty string is a subset of every other string.
Example 2: Using contains() With if...else
Output
Swift Programming Language contains Swift Swift Programming Language doesn't contain swift