diff --git a/1-js/05-data-types/02-number/article.md b/1-js/05-data-types/02-number/article.md index 10fd44c9..70e798bd 100644 --- a/1-js/05-data-types/02-number/article.md +++ b/1-js/05-data-types/02-number/article.md @@ -430,6 +430,7 @@ For different numeral systems: - `num.toString(base)` converts a number to a string in the numeral system with the given `base`. For regular number tests: + - `isNaN(value)` converts its argument to a number and then tests it for being `NaN` - `isFinite(value)` converts its argument to a number and returns `true` if it's a regular number, not `NaN/Infinity/-Infinity`