Deciding when to use a variable or a constant can be tricky.

Variables are good for information that can change. But keeping track of these changes can sometimes get confusing.

Constants are best for values that stay the same. However, if you wrongly label something as a constant, that can lead to mistakes.

To make this easier, think about what will change and what will stay the same before you start coding.

Also, write down your decisions. This will help you avoid making errors later on.