Java is strongly typed language, this means that every viable must have a declared type.
Java does not have any unsigned types
4 integer types
(int, long, short, byte)
4 bytes, 8 bytes, 2 bytes, 1 byte
long number: 400000000L
Hexadecimal: 0xCAFE
Octal: 0700
2 Floating point types
float (4), double (8)
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