5 lines
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547 B
Markdown
5 lines
No EOL
547 B
Markdown
We generally use upper case for constants that are "hard-coded". Or, in other words, when the value is known prior to execution and directly written into the code.
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In this code, `birthday` is exactly like that. So we could use the upper case for it.
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In contrast, `age` is evaluated in run-time. Today we have one age, a year after we'll have another one. It is constant in a sense that it does not change through the code execution. But it is a bit "less of a constant" than `birthday`, it is calculated, so we should keep the lower case for it. |