What is the proper usage of underscores in programming?

What is the proper usage of underscores in programming?

Underscores are often used in programming for various purposes, such as separating words in variable names (e.g., my_variable). They can also indicate private variables or methods in some languages.

Are there any specific conventions for using underscores in Python?

Yes, in Python, underscores have specific meanings. A single underscore before a variable name (e.g., _variable) indicates it is intended for internal use. A double underscore (e.g., __variable) triggers name mangling, which helps avoid naming conflicts.

What about underscores in file names?

In file names, underscores are commonly used to improve readability, especially in places where spaces are not allowed. For example, my_file_name.txt is clearer than myfilename.txt.

Can you give me examples of when to use underscores in JavaScript?

In JavaScript, underscores are often used in variable names to separate words, like user_name. They can also be used in private properties or methods, following conventions like _privateMethod().