JavaScript | Strings
JavaScript strings are used for storing and manipulating text. It can contain zero or more characters within quotes.
Example:
<!DOCTYPE html><html> <head> <title> JavaScript Strings </title></head> <body> <h1>GeeksforGeeks</h1> <h2>JavaScript Strings</h2> <p id="GFG"></p> <!-- Script to store string in variable --> <script> // String written inside quotes var x = "Welcome to GeeksforGeeks!"; document.getElementById("GFG").innerHTML = x; </script></body> </html> |
Output:
Methods to implement string: There are mainly two methods to implementing strings which are listed below.
- Example 1: Use either single or double quotes to write strings.
<!DOCTYPE html><html><head><title>JavaScript Strings</title></head><body><h1>GeeksforGeeks</h1><h2>JavaScript Strings</h2><p id="GFG"></p><!-- Script to initialize string --><script>varx ="GeeksforGeeks";vary ='A computer science portal';document.getElementById("GFG").innerHTML =x +"<br>"+ y;</script></body></html>Output:
- Example 2: Quotes can be used inside a string, as long as they don’t match the quotes surrounding the string.
<!DOCTYPE html><html><head><title>JavaScript Strings</title></head><body><h1>GeeksforGeeks</h1><h2>JavaScript Strings</h2><p id="GFG"></p><script>varx ="'GeeksforGeeks'";vary ="A 'computer' 'science' portal";document.getElementById("GFG").innerHTML =x +"<br>"+ y;</script></body></html>Output:
Special characters: As stated above, the special character can’t use the same type of quotes within a string, but there is a solution. It uses the backslash escape character. The backslash ‘\’ escape character turns special characters into normal string characters. The sequence (\”) is used to insert a double quote in a string.
- Example:
<!DOCTYPE html><html><head><title>JavaScript Strings</title></head><body><h1>GeeksforGeeks</h1><h2>JavaScript Stringsforspecial character</h2><p id="GFG"></p><!-- Script to use special character --><script>varx ="\"GeeksforGeeks\" A \'computer science\' portal";document.getElementById("GFG").innerHTML = x;</script></body></html>Output:
- Example: String can be written within single quote.
<!DOCTYPE html><html><head><title>JavaScript Strings</title></head><body><h1>GeeksforGeeks</h1><h2>JavaScript Stringsforspecial character</h2><p id="GFG"></p><!-- Script to use special character --><script>varx ='\"GeeksforGeeks\" A \'computer science\' portal';document.getElementById("GFG").innerHTML = x;</script></body></html>Output:
String Length: The length of a string can be found using the length property.
Example:
<!DOCTYPE html><html> <head> <title> JavaScript Strings </title></head> <body> <h1>GeeksforGeeks</h1> <h2>JavaScript Strings length</h2> <p id="GFG"></p> <!-- Script to return the length of string --> <script> var len = "GeeksforGeeks"; // Returns the length of string document.getElementById("GFG").innerHTML = len.length; </script></body> </html> |
Output:
String Breaking: Sometimes we need to divide the string for ease of understanding, the symbol \ can be used but its not preferred. The preferred method is to use the + symbol between the two strings.
Example:
<!DOCTYPE html><html> <head> <title> JavaScript Strings </title></head> <body> <h1>GeeksforGeeks</h1> <h2>JavaScript Strings break lines</h2> <p id="GFG"></p> <!-- Script to break the line --> <script> document.getElementById("GFG").innerHTML = "Welcome" + " to GeeksforGeeks!"; </script></body> </html> |
Output:
Strings As Objects: Strings can be used as objects by using the keyword ‘new’.
Example:
<!DOCTYPE html><html> <head> <title> JavaScript Strings </title></head> <body> <h1>GeeksforGeeks</h1> <h2>JavaScript Strings as object</h2> <p id="GFG"></p> <!-- Script to use string as object --> <script> // Declare a string var x = "Great Geek"; // Declare an object var y = new String("Great Geek"); document.getElementById("GFG").innerHTML = typeof x + "<br>" + typeof y; </script></body> </html> |
Output:
.png)