Strings are written inside quotes, you can use any single or double quotes per your preference.
The length of a string is found with the built-in length property, example: name.length;
When using the === operator, equal strings are not equal, because the === operator expects equality in both type and value.
var name = “Navjot Singh”;
var name = ‘Navjot Singh’;
Both are correct.
How are Strings stored ? And How to access String Characters ?
Each character in a String is stored at an index, starting from zero meaning, the first character is at index 0, second at index 1, third at index 2, and so on. This is important to understand as this helps you manipulate strings, in different ways that we will learn later in the article.
var name = new String(“Navjot Singh”);
How to insert Special Characters in a String ?
The backslash () escape character turns special characters into string characters.
var paragraph = “\@ is a special character, since I used the backslash before the special character\, now it will be treated as a string”.
Read more about Special Characters on W3Schools
String Properties and Methods
Primitive/String values, like “I am just a String”, cannot have properties or methods (since they are not objects).
Which means you are free to use any of the inbuilt JS properties and methods on your string variables.
|constructor||Returns the string’s constructor function|
|length||Returns the length of a string|
|prototype||Allows you to add properties and methods to an object|
|charAt()||Returns the character at the specified index (position)|
|charCodeAt()||Returns the Unicode of the character at the specified index|
|concat()||Joins two or more strings, and returns a new joined strings|
|endsWith()||Checks whether a string ends with specified string/characters|
|fromCharCode()||Converts Unicode values to characters|
|includes()||Checks whether a string contains the specified string/characters|
|indexOf()||Returns the position of the first found occurrence of a specified value in a string|
|lastIndexOf()||Returns the position of the last found occurrence of a specified value in a string|
|localeCompare()||Compares two strings in the current locale|
|match()||Searches a string for a match against a regular expression, and returns the matches|
|repeat()||Returns a new string with a specified number of copies of an existing string|
|replace()||Searches a string for a specified value, or a regular expression, and returns a new string where the specified values are replaced|
|search()||Searches a string for a specified value, or regular expression, and returns the position of the match|
|slice()||Extracts a part of a string and returns a new string|
|split()||Splits a string into an array of substrings|
|startsWith()||Checks whether a string begins with specified characters|
|substr()||Extracts the characters from a string, beginning at a specified start position, and through the specified number of character|
|substring()||Extracts the characters from a string, between two specified indices|
|toLocaleLowerCase()||Converts a string to lowercase letters, according to the host’s locale|
|toLocaleUpperCase()||Converts a string to uppercase letters, according to the host’s locale|
|toLowerCase()||Converts a string to lowercase letters|
|toString()||Returns the value of a String object|
|toUpperCase()||Converts a string to uppercase letters|
|trim()||Removes whitespace from both ends of a string|
|valueOf()||Returns the primitive value of a String object|
All string methods return a new value. They do not change the original variable.
Read more on W3Schools to know more about each method and properties usage examples, the recommendation is to create your string variable and try using these properties and method and see what results do you get back.