Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

C# C# Basics C# Syntax Variables

Why Don't you put inverted commas around 4 in var number = 4;

In the nextstep inverted commas were around hello but not around 4 why?

2 Answers

Data types. Anything in between the inverted commas is a 'string'; a text data type. If you type the number 4 not in inverted commas, then it is a number data type, and can be used to do calculations. You cannot do calculations with a text data type.

Steven Parker
Steven Parker
215,954 Points

i believe what you are referring to as "inverted commas" is typically called "quote marks" or just "quotes".

And quotes are used around strings, but not around numbers. You can do math (like "number + 1") only on numbers.