Determine the Datatype of Numeric Literals

Numeric literals entered with E notation are treated as float; all others are treated as exact numerics.

Literals between 2³¹ - 1 and -2³¹ with no decimal point are treated as integer.
Literals that include a decimal point, or that fall outside the range for integers, are treated as numeric.

Note: To preserve backward compatibility, use E notation for numeric literals that should be treated as float.