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.The core concept of this lesson is to learn how to call a function and assign the return value to a variable. FreeCodeCamp offers a curriculum and in this video we cover their lesson called Assignment with a Returned Value. 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. Construct a point estimate of the proportion of items returned for the population of sales transactions at the Houston store. .. When we have variables and we're assigning it to a value what's the saying is that whenever we have a whatever is on the right of the equal sign. Call the processArg function with an argument of 7 and assign its return value to the variable processed. View (10CH7) Assignment Instructions.