Functions act as placeholders for the data they output. Basically, you can assign the output of a function to a variable, just like any normal data.We can take the return value of a function and assign it to a variable. Assume we have pre-defined a function sum which adds two numbers together. The core concept of this lesson is to learn how to call a function and assign the return value to a variable. The form must be completed and returned as instructed as well as providing your work search activity record. • Show full purchase price of real property. Browse the answers to the most commonly asked questions put to the Assessor's office.