You can check if a string is a valid number using the isNaN()
function.
Example:
javascriptlet isNumber_0 = !isNaN('47'); // true let isNumber_1 = !isNaN('47.25'); // true let isNumber_2 = !isNaN('47,25'); // false let isNumber_3 = !isNaN('Erik'); // false let isNumber_4 = !isNaN(''); // true
Hi, I'm Erik, an engineer from Barcelona. If you like the post or have any comments, say hi.