How do variable naming conventions differ across programming languages?

What are the common naming conventions for variables in Python?

In Python, variable names typically use snake_case, where words are separated by underscores, like this: my_variable.

What about Java? How do I name variables there?

In Java, the convention is to use camelCase, where the first word is lowercase and subsequent words are capitalized, like this: myVariable.

Are there any specific rules I should follow for naming variables in JavaScript?

Yes, in JavaScript, variable names can use camelCase as well, and they must start with a letter, underscore, or dollar sign.

Can you give me examples of variable names that are considered bad practice?

Sure! Examples of bad variable names include single letters like 'x' or 'y' unless in a loop, or names like 'data' or 'temp' that are too vague.