Writing out Text vs. Numbers

In R, to output text you will use single or double quotes:

"Hello World!"

[1] "Hello World!"

'Hello World!' 

[1] "Hello World!"

To output numbers you just type out the number. Also, note that I do not use a comma when writing out my four-digit number:

5

[1] 5

75

[1] 75

1000

[1] 1000