1234             Integer or real number
123-45-6789      SSN
23,354           Numbers with commas
4,345,205        Numbers with commas
24,345,205       Numbers with commas
454,345,205      Numbers with commas
43,45,2,05       A list of numbers
3343,345         A list of numbers
.4               Number with a dot (real number)
123.             Number with a dot (real number)
4.43             Number with a dot (real number)
.                Not a number with a dot
+1               Real number
1e3              Real number
1e-3             Real number
1.E+2            Real number
-1.23E-12        Real number