Because + operator tells JavaScript to wrap both sides of it with Number(). Left side here is blank, so Number() gives you 0. Right side here is "22", so Number("22") gives you 22. Then + operator adds these 2 Numbers together and gives you 22.
That's a lazy way to convert a String to a Number.
The explicit equivalent way is const stringToNumber = Number(string).
However, if you need more fine-tuned control over the parsing of the string, consider using parseInt or parseFloat (which lets you parse number representation in bin, oct, hex, etc., not just dec)
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So you basically just want to convert string to a number?
Why does this work like this do you know?
Because
+operator tells JavaScript to wrap both sides of it withNumber(). Left side here is blank, soNumber()gives you 0. Right side here is "22", soNumber("22")gives you 22. Then+operator adds these 2Numbers together and gives you 22.That's a lazy way to convert a String to a Number.
The explicit equivalent way is
const stringToNumber = Number(string).However, if you need more fine-tuned control over the parsing of the string, consider using parseInt or parseFloat (which lets you parse number representation in bin, oct, hex, etc., not just dec)