Values and Type Conversions
Integers are strings of digits possibly with a minus sign.0 15 -127
Real numbers contain a decimal point (digit before, after)0.0 15.2 -127.0004
Reals can also be written in modified scientific notation345.6 .3456E03-0.00078 -7.8E-4
Operations, and assignment, require “appropriate” types.
Integer values are implicitly coerced to real values if the context requires it. Reals are not coerced to integers.