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JavaScript

Posted by Robert Chamblee
Robert Chamblee
12,711 Points

parseInt vs. +

Is there any meaningful difference between the two different ways this string is converted to an integer?

var ratingInput = '3';

var newRating = parseInt(ratingInput);

OR

var newRating = +ratingInput;

1 Answer

David Bath
David Bath
25,940 Points

In that particular context there is no difference. If you were to apply the same code to a different string though, the results could be different. For instance

var ratingInput = '3.5';
var newRating = parseInt(ratingInput); // => 3
var newRating2 = +ratingInput; //  => 3.5

or

var ratingInput = '3 stars';
var newRating = parseInt(ratingInput); // => 3
var newRating2 = +ratingInput; //  => NaN