It's not just about preventing bugs. Types restrict what you can do with each variable, such as what methods/members exist on the variable and what valid operat

It's not just about preventing bugs. Types restrict what you can do with each variable, such as what methods/members exist on the variable and what valid operations you can do with it. It makes development easier because you don't have to hold it all in your head. Every member/method access is validated at compile time, without needing to write any tests. You may not make such mistakes when writing dynamically typed code, but if you ever need to change something (like the name or type of a variable/method/member) it inevitably means trawling through all references in your codebase manually and changing them by hand. Please correct me if there's a better way to do it in dynamically typed languages.