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Wikifunctions is a Wikimedia project for everyone to collaboratively create and maintain a library of code functions to support the Wikimedia projects and beyond, in the world's natural and programming languages.

A "function" is a sequence of programming instructions that makes a calculation based on data you provide. Functions can answer questions, such as how many days have passed between two dates, or the distance between two cities.

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Wikifunctions in 7 minutes

Functions to try out

reverse string (Z10012): Inverts the order of the characters in a String (see Z10548 for one with Unicode grapheme support)
is a palindrome (Z10096): test if a string is the same when read forward and backward (see Z10553 for one with Unicode grapheme support)
substring exists (Z10070): Check if a substring exists within another string
To Uppercase (Z10018): Convert a string to uppercase letters
To Lowercase (Z10047): Convert a string to lowercase letters
join two strings (Z10000): combine two strings, one after the other
Trim String (Z10079): Remove starting and ending whitespaces
is empty string (Z10008): true if the input string is strictly empty, even without any non-printing characters, and false otherwise
string equality (Z866): True if the first string and the second string are the same
Boolean equality (Z844): returns true only if both inputs are equal