CODEWITHSUNDEEP
javascriptnumbers
Joyce Lee
Joyce Lee

Reputation: 309

Javascript Function toString

See the code below:

2.toString();   // error
2..toString();  // "2"
2...toString(); // error

I want to know why 2..toString() can run without errors and what happens when it runs?

Can somebody explain it?

Upvotes: 6

Views: 146

Answers (1)

Nikolay Talanov
Nikolay Talanov

Reputation: 717

http://shamansir.github.io/JavaScript-Garden/en/#object

A common misconception is that number literals cannot be used as objects. That is because a flaw in JavaScript's parser tries to parse the dot notation on a number as a floating point literal.

2.toString(); // raises SyntaxError

There are a couple of workarounds that can be used to make number literals act as objects too.

2..toString(); // the second point is correctly recognized
2 .toString(); // note the space left to the dot
(2).toString(); // 2 is evaluated first

Upvotes: 8

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