To avoid this problem

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Or the barista won't find any cocoa beans at all and the function will display the error "unable to make vanilla mocha." These changes that occur during the function's execution are called side effects.
The developer must not only formulate the command, but also provide all the ingredients vietnam rcs data needed to make coffee. If there are any leftovers, the program will give them along with a cup of mocha.

It is quite difficult to predict the occurrence of side effects. For example, a cook needs to make mashed potatoes and pumpkin soup. In total, both of these dishes will require 20 g of salt. In the process of making the mashed potatoes, the cook uses 10 g of salt, and leaves the rest on the shelf. This can be called a side effect of making the mashed potatoes. After that, the cook starts making pumpkin soup and pours in the remaining 10 g.