Number in Text

[jimfog]

This might look like a silly question but it is in my effort comprehend javascript.Suppose we have a body of text(in a webpage)IF in this body there is a number(5 for example) would this be treated by javascript as a string or as a number?What i want to say is, do special occasions must exist in order for a number in a text be treated as "number" from javascript?I hope i did not confuse you.

[Ingolme]

All the content on a website is treated as a string, but casting to a number is very simple.

[jeffman]

If you can isolate the number from the rest of the text content, it can be treated as a number. A regular expression would be ideal for that, probably. For example:

var s = "dh4dkhjd567kjhkjh890dlgd";var re = /\d+/g;var matches = s.match(re);alert(matches[0]); // "4"alert(matches[1]); // "567"alert(matches[2]); // "890"

The re can get more precise if you need it to.

[jeffman]

You have to be careful with implicit casting, though, especially when using the overloaded + operator

"5" * 5 // 25"5" + 5 // "55"Number("5") + 5 // 10