In Java, we have primitive data types and objects. Java support 8 primitive data types:
Reference:
https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
| Data Type | Value |
|---|---|
| byte | 0 |
| short | 0 |
| int | 0 |
| long | 0L |
| float | 0.0f |
| double | 0.0d |
| char | '\u0000' |
| boolean | false |
The Go language is a statically typed programming language. This means that variable always has specific type that can't be changed. The Go language data type can be divided in main three categories:
- Boolean: A boolean type represents the set of Boolean truth values denoted by the predeclared constants true and false. The predeclared boolean type is bool.
- Numeric: A numeric type represents sets of integer or floating-point values. The predeclared architecture-independent numeric types are: int, float32, float64, etc
- String: A string type represents the set of string values. A string value is a (possibly empty) sequence of bytes. Strings are immutable: once created, it is impossible to change the contents of a string. The predeclared string type is string.
| Data Type | Default Value | Range |
|---|---|---|
| bool | false | true or false |
| int | 0 | either int32 or int64 |
| int8 | 0 | signed 16-bit integers (-32768 to 32767) |
| int16 | 0 | signed 16-bit integers (-32768 to 32767) |
| int32 | 0 | signed 32-bit integers (-2147483648 to 2147483647) |
| int64 | 0 | signed 64-bit integers (-9223372036854775808 to 9223372036854775807) |
| uint | 0 | either 32 or 64 bits |
| uint8 | 0 | unsigned 8-bit integers (0 to 255) |
| uint16 | 0 | unsigned 16-bit integers (0 to 65535) |
| uint32 | 0 | unsigned 32-bit integers (0 to 4294967295) |
| uint64 | 0 | unsigned 64-bit integers (0 to 18446744073709551615) |
| float32 | 0 | IEEE-754 32-bit floating-point numbers |
| float64 | 0 | IEEE-754 64-bit floating-point numbers |
| string |
Reference: https://golang.org/ref/spec#Types
Next article we will learn about variables in the Go Language
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