About the double type and float type of Java

1.double type

(1) Double is a dual-precision floating-point number (commonly used, 8-byte 64-bit), and a double is used to perform the operation of floating-point numbers

(2) floating point Direct quantity is double type

(3) error when double operation

2.float type

(1) Float is a single-precision floating-point number (infrequently used, 4 bytes 32 bits)

Double calculates the occurrence error example.

Double money=3.0;
Double price=2.9;
System.out.println (Money-price);

For the calculation of the money class, use the BigDecimal type

About the double type and float type of Java