chapter1.amp

%%[
    /* 
       Steps:
       1. Define the Data Extension name, the attribute to fetch, 
          the attribute to search by, and the value to search for.
       2. Use LookUp to perform the search and fetch the data.
       3. Output the fetched value for use or display.
    */

    /* Declare variables */
    var @response, @dataExtensionName, @attributeToFetch, @attributeToSearch, @valueToSearch

    /* Set the name of the data extension to be used */
    set @dataExtensionName = "My_DataExtension"

    /* Set the attribute to fetch from the data extension */
    set @attributeToFetch = {{attributeToFetch}}

    /* Set the attribute to search by in the data extension */
    set @attributeToSearch = {{attributeToSearch}}

    /* Set the value to search for in the given attribute */
    set @valueToSearch = {{valueToSearch}}

    /* Use the LookUp function to fetch the value of 
       the specified attribute based on the search criteria */
    set @response = LookUp(@dataExtensionName, @attributeToFetch, @attributeToSearch, @valueToSearch)

    /* Output the fetched response value */
    OutputLine(v(@response))
]%%