</source>One common annoyance that can occur when performing searches are '''error messages''' when performing a search for an element that happens NOT to exist in the list. A good way to prevent those type of errors is to use a logic an '''if''' statement to check to see if the value for an element is in a list, then the appropriate search can be performed for that existing element value.<br><br>

:This last section demonstrates an extremely useful for lists: the ability to quickly '''loop through every value in the list'''. '''For loops''' have a set number of times they loop. The '''for''' loop (a "determinant" loop) will execute all indented code for each item (element) in the list. Using loops with list allow for efficient processing of stored data.