A string is a series or combination of letters, integers, special characters, and mathematical values. Strings can be produced by enclosing the string literal (i.e. string characters) either between single quotes (‘) or double quotations (“).
The syntax of defining a String literal is as follows:
varstringName = “string “;
varstringName = “string”;
The syntax to create a String global object looks like this, where data is any object that is convertible to a string:
varstringName = newString(data);
Escape sequences are also useful for situations where you want to use characters that can’t be typed using a keyboard. Here are some other most commonly used escape sequences.
- \n is replaced by the newline character
- \t is replaced by the tab character
- \r is replaced by the carriage-return character
- \b is replaced by the backspace character
- \\ is replaced by a single backslash (\)
|charAt()||It returns the char value found at the provided index.|
|charCodeAt()||It returns the Unicode value of a character at the requested index.|
|concat()||It allows you to combine two or more strings.|
|indexOf()||It returns the location of a char value in the specified string.|
|lastIndexOf()||It returns the location of a char value in the provided string by searching from the last position.|
|search()||It scans a given text for a defined regular expression and provides its place if a match is found.|
|match()||It examines a given string for a defined regular expression and returns that regular expression if a match is found.|
|replace()||It replaces the specified string with the provided string.|
|substr()||It is utilized to get a portion of the provided string based on the defined starting place and length.|
|substring()||It is used to get a portion of the provided text based on the defined index.|
|slice()||It is used to retrieve a portion of the specified string. It enables us to give both positive and negative indexes.|
|toLowerCase()||It lowercases the string that is sent to it.|
|toLocaleLowerCase()||It changes the provided string to lowercase letters based on the host?
‘s current location
|toUpperCase()||It changes the string to uppercase letters.|
|toLocaleUpperCase()||It changes the provided text to uppercase letters based on the host?
‘s current location
|toString()||It returns a string that represents the specific item.|
|valueOf()||It returns the strings object’s primitive value.|
|split()||It divides a string into substring arrays and returns the resulting array.|
|trim()||It removes the white space from the string’s left and right sides.|
The length attribute gives the string’s length, which is the amount of characters it contains. This also contains the quantity of special characters, such as \t or \n.
You may use the search() function to find a specific element of text or pattern within a string.
The search() function, like the indexOf() method, produces the index of the first match and -1 if no matches are discovered; however, unlike the indexOf() method, this method may additionally accept a regular expression as an input to give sophisticated search capabilities.
quick brown fox fox jumps the lazy dog.
Replacing the Contents of a String
You can use the replace() method to replace part of a string with another string. This method takes two parameters a regular expression to match or substring to be replaced and a replacement string, like str.replace(regexp|substr, newSubstr).
This replace() method returns a new string, it doesn’t affect the original string that will remain unchanged.
You can use the toUpperCase() method to convert a string to uppercase, like this:
The String constructor is used to create a new String object. When invoked as a function, it converts the type to a primitive string, which is generally more helpful.
Q2. What are string functions?
We may use string functions using Access to generate expressions that alter text in a number of ways. On a form, for example, you could wish to show only a portion of a serial number. Alternatively, you may need to connect (concatenate) two strings together, such as a last name and a first name.
Q3. What is a string in coding?
A string data type is utilized in various programming languages for data values that are made up of ordered sequences of characters, such as “hello world.” A string can include any visible or unseen series of characters, and characters can be repeated.