Floating Point Number in C Language

Three basic formats of floating point representation:
Decimal format: contains a decimal point, for example, 110.0.
Exponential form: for example, 11e1, the decimal part is multiplied by the Base Value of 10, and the digits after E are the same as the power. e case.
Use the decimal point and index, for example, 1.1e2.

Floating Point Data Type:
Float single precision
Double double

Long Double Extended Double Precision

Note:

Avoid two real numbers for equal judgment
Use floating point numbers as cyclic variables with caution
Avoid adding or relating a large number to a small number. Otherwise, a small number will be lost.
When performing floating-point operations, use double type as much as possible to improve accuracy and reduce error