Checks if value is classified as a number primitive.
value
number
The value to check.
Returns true if value is a number, else false.
true
false
isNumber(123)// => trueisNumber(Number.NaN)// => trueisNumber(Infinity)// => trueisNumber('123')// => false Copy
isNumber(123)// => trueisNumber(Number.NaN)// => trueisNumber(Infinity)// => trueisNumber('123')// => false
Checks if
valueis classified as anumberprimitive.