Check if a value is a finite number or a string holding one. Accepts optional leading sign, decimal forms (.5, 5., 3.14), and scientific notation (1e5, -3.14e-2).
.5
5.
3.14
1e5
-3.14e-2
Check if a value is a finite number or a string holding one. Accepts optional leading sign, decimal forms (
.5,5.,3.14), and scientific notation (1e5,-3.14e-2).