0
42
-5
3.14159
5e4
6E-78
0.3e+1
----------------------------------------------------
[
["number", "0"],
["number", "42"],
["number", "-5"],
["number", "3.14159"],
["number", "5e4"],
["number", "6E-78"],
["number", "0.3e+1"]
]
----------------------------------------------------
Checks for numbers.