You can cast integers to strings

[cD1rtX3]

12.toString()

gets tokenized as 12. toString ( ), which is errant. This is not just an issue with the toString function, but rather with every member of numbers. (JavaScript only has two numeric types, and "integer" is not one of them.)

You can prove this by writing:

12 .toString()

which gets tokenized as 12 . toString ( ), and thus returns 12, an integer, as a string.

[cD1rtX3]

Github's syntax highlighting reflects this. Notice how the dot is blue in

12.toString()

since it's part of the number, but white in

12 .toString()

since it's an operator.

[njt1982]

for me, 12.toString() without space does not work (syntat error)... But it does work if you put 12 in a variable first:

[cD1rtX3]

Yes, I know. It's not supposed to. That's what I said.