Awk Functions

Awk provides us with several built in functions for manipulating numbers and strings.

A list of these functions and a description of what they do is shown below :-

Function Name Operation
length(string) returns the number of characters in string;
if you do not supply an argument, it returns the number of characters in the current input record.
int(number) returns the integer portion of number.
index(string1, string2) returns the index of string2 in string1 or 0 if string2 is not present.
split(string, array, delimiter) places elements of string, delimited by the delimeter, in the array array[1]...array[n]; returning the number of elements in the array.
sprintf(format, arguments) formats arguments according to the format and returns the formatted string; mimics the C programming language function of the same name.
substr(string, position, length) returns a substring of string that begins at position and is length characters long.

*Function Name*	*Operation*
length(string)	returns the number of characters in string; if you do not supply an argument, it returns the number of characters in the current input record.
int(number)	returns the integer portion of number.
index(string1, string2)	returns the index of string2 in string1 or 0 if string2 is not present.
split(string, array, delimiter)	places elements of string, delimited by the delimeter, in the array array[1]...array[n]; returning the number of elements in the array.
sprintf(format, arguments)	formats arguments according to the format and returns the formatted string; mimics the C programming language function of the same name.
substr(string, position, length)	returns a substring of string that begins at position and is length characters long.