LENGTH Function (2023)

The LENGTH function returns an integer equal to the length of the argument in character positions. This type of function is integer.


FUNCTION LENGTH (argument-1)


  1. argument-1 may be a non-numeric literal or a data item of any class or category.
  2. If argument-1 (or any data item subordinate to argument-1) is described with the DEPENDING phrase of the OCCURS clause, the contents of the data item referenced by the data-name specified in the DEPENDING phrase are used at the time the LENGTH function is evaluated.

Returned Values

  1. If argument-1 is a non-numeric literal or an elementary data item, or if argument-1 is a group data item that does not contain a variable occurrence data item, the value returned is an integer equal to the length of argument-1 in character positions.
  2. If argument-1 is a group data item containing a variable occurrence data item, the returned value is an integer determined by evaluation of the data item specified in the DEPENDING phrase of the OCCURS clause for that variable occurrence data item. This evaluation is accomplished according to the rules in the OCCURS clause dealing with the data item as a sending data item.
  3. The returned value includes implicit FILLER characters, if any.

    Note: This function is similar in functionality to the Format 8 Set SET statement: SET result-item TO SIZE OF data-item.


LENGTH Function? ›

The LENGTH function returns the clipped length of a CHARACTER or VARCHAR string and the full number of bytes in a TEXT or BYTE string. IBM® Informix® also supports the CHAR_LENGTH function, which returns the number of logical characters in its string argument, rather than the number of bytes.

What is the LENGTH function in SQL? ›

The LENGTH function returns the number of bytes of data in character data. The OCTET_LENGTH function returns the number of bytes and generally includes trailing white space characters in the byte count.

Why is LENGTH function used? ›

The function will return the length of a given text string. In financial analysis, the LEN function can be useful if we wish to get the length of a given text string as the number of characters. LEN will also count characters in numbers, but number formatting is not included.

How do you make a LENGTH function? ›

To use the len() function to get the length of a data type, assign the data type to a variable, then pass the variable name to the len() function.

What is the LENGTH function in C++? ›

C++ String length()

This function is used to find the length of the string in terms of bytes. This is the actual number of bytes that conform the contents of the string , which is not necessarily equal to the storage capacity.

What does length () return? ›

length() The length() method is a static method of String class. The length() returns the length of a string object i.e. the number of characters stored in an object.

Is length () a string function? ›

Java String length() Method

The length() method returns the length of a specified string.

What is the difference between length () and? ›

Java length vs length() explained. The key difference between Java's length variable and Java's length() method is that the Java length variable describes the size of an array, while Java's length() method tells you how many characters a text String contains.

How do you use the LENGTH function in a string? ›

Java String length() method example
  1. public class LengthExample{
  2. public static void main(String args[]){
  3. String s1="javatpoint";
  4. String s2="python";
  5. System.out.println("string length is: "+s1.length());//10 is the length of javatpoint string.

What is the difference between length and length ()? ›

length is an attribute i.e. a data member of array. length() is a member method of String class. It gives the length of an array i.e. the number of elements stored in an array. It gives the number of characters present in a string.

What type of function is length? ›

The LENGTH function returns an integer equal to the length of the argument in character positions. This type of function is integer.

What does the LENGTH function tell you in statistics? ›

LENGTH intrinsic function

It returns the length of any other data item as an integer equal to the length of the argument in alphanumeric character positions.

What is variable LENGTH function? ›

Variable-length arguments, abbreviated as varargs, are defined as arguments that can also accept an unlimited amount of data as input. The developer doesn't have to wrap the data in a list or any other sequence while using them.

What is the LENGTH function in coding? ›

The strlen() function calculates the length of a given string. The strlen() function takes a string as an argument and returns its length. The returned value is of type size_t (an unsigned integer type). It is defined in the <string.h> header file.

Does length () count spaces C++? ›

String length() in C++ is similar function to string size() in c++, both returns the size of provided string. This function counts all the characters, symbols, and whitespaces in the string.

How to get length of a string in C? ›

String Length in C Using Built-In Library Function

The length of a string can be found using the built-in library function strlen() in string. h header file. It returns the length of the string passed to it (ignoring the null character). The string is passed to the strlen() function, which returns its length.

Is Len () a built-in function? ›

The function len() is one of Python's built-in functions. It returns the length of an object.

What does the string function length () return? ›

The strlen() function returns the length of string.

Why length is not a function? ›

All array like objects have a property called length , which when be read returns the number of items contained in the array like object. That being said there isn't any function called length. Hence length() is meaningless.

What is length of an array? ›

The length data property of an Array instance represents the number of elements in that array. The value is an unsigned, 32-bit integer that is always numerically greater than the highest index in the array.

What is a length example? ›

Some examples of measurement of length using standard units are centimeters, meters, kilometers, inches, feet, yards, etc.

Is length always first? ›

The first dimension to measure is length. Length is always the longest side of the box that has a flap. The next dimension is width.

What is the use of length function in Java? ›

length() in Java is a final method, which is applicable for string objects. You can use it to find the number of characters in a string. For example, string. length() will return the number of characters in “string.”

Is length a function or property? ›

length is a property it must be called through an instance of a string class.

What is the definition of length? ›

: the measured distance from one end to the other of the longer or longest side of an object. also : any measured distance. : the quality or state of being long. : the amount of time something takes. the length of a visit.

Which function is used to measure the length? ›

Ruler. The first tool that can be used to measure length is a ruler.

Which function displays the length of any string? ›

The strlen() function returns the length of a string.

What does function length do in string class *? ›

The length() function calculates the number of characters in a string.

What type of data is length in statistics? ›

Quantitative data is numerical. It's used to define information that can be counted. Some examples of quantitative data include distance, speed, height, length and weight.

What type of variable is length? ›

Examples of a measurement variable are variables such as length, weight or number of births.

What is the difference between fixed and variable length? ›

Fixed-length records - all the records are exactly the same length. Variable-length records - the length of each record varies.

What are examples of variable function? ›

There is one dependent variable, the price of pizza and there are three independent variables, the prices of tomato sauce, cheese, and pizza dough. This is another example of a function.

What is length variable in C? ›

In computer programming, a variable-length array (VLA), also called variable-sized or runtime-sized, is an array data structure whose length is determined at run time (instead of at compile time). In C, the VLA is said to have a variably modified type that depends on a value (see Dependent type).

How to declare variable length in C? ›

Example of Variable length array in C

void oneDArray( int n, int arr[ n ]; void twoDArray( int row, int col, int arr[ row ][ col ]; In the above example, we see that function parameters of oneDArray and twoDArray are declared with variable length array type.

Does C have a LENGTH function? ›

The strlen() function in C is used to calculate the length of a string. Note: strlen() calculates the length of a string up to, but not including, the terminating null character. Return Value: The function returns the length of the string passed to it.

What is difference between length () and size () in C++? ›

We can use the size() function to get the size of other containers like vectors in C++, whereas length() is used only for string objects. We can finally conclude that both size() and length() functions can be used as synonyms.

What is the maximum length in C++? ›

While an individual quoted string cannot be longer than 2048 bytes, a string literal of roughly 65535 bytes can be constructed by concatenating strings.

What removes spaces from C++? ›

To remove whitespace from a string in C++, we can use the std::remove_if function, the std::regex_replace function, or the Boost Library in C++. The erase_all() function in the boost library can remove any specific type of whitespaces from a string.

How to use data length in SQL? ›

SQL Server DATALENGTH() Function

The DATALENGTH() function returns the number of bytes used to represent an expression. Note: The DATALENGTH() function counts both leading and trailing spaces when calculating the length of the expression. Tip: Also see the LEN() function.

What is the difference between length () and Len () function in SQL? ›

Purpose of the SQL LENGTH or LEN Function

You specify the string you want to find the length of, and the LENGTH or LEN function returns a number representing the number of characters of that string. The function is called LENGTH in Oracle, MySQL, and Postgres, and it's called LEN in SQL Server.

Where is the length in SQL? ›

You can use the LEN function () to find the length of a string value in SQL Server, for example, LEN (emp_name) will give you the length stored in the emp_name string.

How do I find the length of a column in SQL? ›

Use COL_LENGTH() to Get a Column's Length in SQL Server

In SQL Server, you can use the COL_LENGTH() function to get the length of a column. More specifically, the function returns the defined length of the column, in bytes. The function accepts two arguments: the table name, and the column name.

How do I query the length of a string in SQL? ›

Well, you can use the LEN() function to find the length of a String value in SQL Server, for example, LEN(emp_name) will give you the length of values stored in the column emp_name.

How do I specify character length in SQL? ›

The CHAR and VARCHAR types are declared with a length that indicates the maximum number of characters you want to store. For example, CHAR(30) can hold up to 30 characters. The length of a CHAR column is fixed to the length that you declare when you create the table. The length can be any value from 0 to 255.

What is variable length in SQL? ›

A VARIABLE length string (can contain letters, numbers, and special characters). The size parameter specifies the maximum string length in characters - can be from 0 to 65535. BINARY(size)

What does length function return in SQL? ›

The LENGTH() function returns the length of a string (in bytes).

How do I find the longest and shortest string in SQL? ›

SQL LENGTH – Finding Max & Min String Width
  1. SELECT MAX(LENGTH(<column_name>)) AS MaxColumnLength FROM Table;
  2. SELECT MIN(LENGTH(<column_name>)) AS MinColumnLength FROM Table;
  3. SELECT MAX(LENGTH(<column_1>)) AS MaxColLen1, MAX(LENGTH(<column_2>)) AS MaxColLen2 FROM Table;

How do I find the length of a column and data type in SQL? ›

You can get the MySQL table columns data type with the help of “information_schema. columns”. SELECT DATA_TYPE from INFORMATION_SCHEMA. COLUMNS where table_schema = 'yourDatabaseName' and table_name = 'yourTableName'.

How do I count the length of a row in SQL? ›

In SQL, you can make a database query and use the COUNT function to get the number of rows for a particular group in the table. Here is the basic syntax: SELECT COUNT(column_name) FROM table_name; COUNT(column_name) will not include NULL values as part of the count.

How do I change the length in SQL? ›

Here is how you do it: ALTER TABLE address MODIFY state VARCHAR(20) ; In generic terms, you use the ALTER TABLE command followed by the table name, then the MODIFY command followed by the column name and new type and size.

How to get data type and length in SQL Server? ›

In addition to the LEN() function, SQL Server also has a DATALENGTH() function. This function can be used on all data types in your table. That's all there is to it. Another little function that you probably won't use often, but this is helpful to know it is there when you do need to use it.

What is the maximum length function in SQL? ›

The maximum length of an SQL statement string is 65,000 characters.

What is the length of text type in SQL? ›

TEXT is a variable-length data type that can store long character strings. TEXT can hold up to 2,147,483,647 bytes of data. The actual storage used depends on the length of the character string.


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