What are the different built in string functions in JavaScript?

Answer 1

String functions are the set of functions that we generally need while playing with strings like:

strlen - finds length of the string

strcat - for concatenation

strcpy - for copying

strcmp - for comparing, etc.

Thanks

Answer 2

There are a huge range of string operations. A comprehensive list of them including how to use them can be found in the java api:

http://java.sun.com/j2se/1.5.0/docs/api/java/lang/String.html

Answer 3

In any programming language, you would use a string (or equivalent in other languages) any time you want to store a text. For example, to store the name of a person.

Strings in java are special data types that can hold a series of alpha numeric values. For ex:

String name = "James Bond 007";

The above statement declares a string with name as "name" and values as "James Bond 007". Anywhere you use the variable "name" it will be substituted with its value.

Strings are a very useful data type that can hold almost any sequence of characters that can be entered using the keyboard. Strings have many features like concatenation, substring etc that add more functionality.

Answer 4

String Methods:

• MethodDescriptioncharAt() returns the character at the specified index.
• charCodeAt() returns a number indicating the Unicode value of the character at the given index.
• concat() combines the text of two strings and returns a new string.
• indexOf() returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found.
• lastIndexOf() returns the index within the calling String object of the last occurrence of the specified value, or -1 if not found.
• localeCompare() returns a number indicating whether a reference string comes before or after or is the same as the given string in sort order.
• length() returns the length of the string.
• match() used to match a regular expression against a string.
• replace() used to find a match between a regular expression and a string, and to replace the matched substring with a new substring.
• search() executes the search for a match between a regular expression and a specified string.
• slice() extracts a section of a string and returns a new string.split()Splits a String object into an array of strings by separating the string into substrings.
• substr() returns the characters in a string beginning at the specified location through the specified number of characters.
• substring() returns the characters in a string between two indexes into the string.
• toLocaleLowerCase() the characters within a string are converted to lower case while respecting the current locale.
• toLocaleUpperCase() the characters within a string are converted to upper case while respecting the current locale.
• toLowerCase() returns the calling string value converted to lower case.
• toString() returns a string representing the specified object.
• toUpperCase() returns the calling string value converted to uppercase.
• valueOf() returns the primitive value of the specified object.

Answer 5

In C, functions exist to perform operations. Some functions manipulate variables in various ways.

C itself does not have any functions. Basic functions are provided by libraries, which your own program files will then use. Some of these functions work with strings.

Because strings are character arrays, they cannot be acted upon by simple operators. Even while other languages have concatenation operators (+ or .), C requires that you use strcat() or write your own string concatenator to join two strings together.

In short, string functions come in handy when you want to work with strings in C. See the related links below for more information on C string functions.

Answer 6

String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).