String position

Most programming languages implement a position or indexOf method on strings.

This method will return the index of the first character of the substring in the main string.

Example

The following Java code shows the indexOf method:

String haystack = "Hello world, Java is a programming language";
String needle = "Java";
int position = haystack.indexOf(needle);
System.out.println(position); // 13

Specific programming languages

• C Sharp string.IndexOf