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. If all debts and liabilities are paid in full, any funds of the estate remaining shall be returned to the assignor. 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.