Data Types
float: floating-point data type. Example of values of this type: 4.3, -123.00, +0.02, 1.2e4, -86e3, 3.9e-12.
A floating-point representation consists of mantissa (fraction part) and exponent, with an assumed base.
double: double-precision floating-point data type. It uses twice the number of bits in the mantissa, hence it may represent more precise values.