> ## Documentation Index > Fetch the complete documentation index at: https://docs.xano.com/llms.txt > Use this file to discover all available pages before exploring further. # Data Manipulation Data Manipulation functions are used to work with and transform data within your function stacks, such as creating variables, performing calculations, and manipulating arrays and objects. Create Variable is used to create a new variable and assign a value to it within your function stack. Update Variable is used to modify the value of an existing variable within your function stack. Conditional is used to execute different code paths based on whether a condition is true or false. Loops are used to repeat a set of operations multiple times, such as iterating through arrays or performing operations until a condition is met. Math functions are used to perform mathematical operations and calculations on numeric values. Array functions are used to manipulate and work with arrays, such as adding, removing, or transforming array elements. Object functions are used to work with and manipulate object data structures, including accessing properties and modifying object values. Text functions are used to manipulate and transform string data, such as formatting, searching, or modifying text content.