Hungarian notation

Hungarian notation is a way of writing variable names in computer programs that helps programmers understand what type of data a variable is holding. For example, if you have a variable that holds a person's name, you might call it "strName" instead of just "name". The "str" stands for "string" which is a type of data that holds text.

This notation was invented by a programmer named Charles Simonyi, who was originally from Hungary ("Hungarian notation" is named after his heritage). He wanted to create a way of naming variables that made it easy for other programmers to understand what type of data was being stored in a variable.

The basic idea is that the first few letters of a variable's name indicate what type of data it holds. For example, "i" might stand for "integer" (which is a whole number), "f" might stand for "float" (which is a number with a decimal point), and "bool" might stand for "boolean" (which is a type of data that can either be "true" or "false").

Some people think that Hungarian notation is no longer necessary or helpful, because modern programming languages have built-in ways of specifying data types. However, others still find it useful as a way of quickly understanding what type of data a variable holds, especially when working with legacy code or complex programs.