Generally speaking, this default will be zero or Local variables are slightly different; the compiler never assigns a default value to an uninitialized local variable.
As shown below, it's possible to assign a literal to a variable of a primitive type: For general-purpose programming, the decimal system is likely to be the only number system you'll ever use.
However, if you need to use another number system, the following example shows the correct syntax.
The prefix ) can appear anywhere between digits in a numerical literal. to separate groups of digits in numeric literals, which can improve the readability of your code.
The Java programming language is statically-typed, which means that all variables must first be declared before they can be used.
This involves stating the variable's type and name, as you've already seen: Doing so tells your program that a field named "gear" exists, holds numerical data, and has an initial value of "1".
A variable's data type determines the values it may contain, plus the operations that may be performed on it.
In addition to , the Java programming language supports seven other primitive data types.
A primitive type is predefined by the language and is named by a reserved keyword.
Primitive values do not share state with other primitive values.
The eight primitive data types supported by the Java programming language are: In addition to the eight primitive data types listed above, the Java programming language also provides special support for character strings via the Enclosing your character string within double quotes will automatically create a new class in Simple Data Objects It's not always necessary to assign a value when a field is declared.
Fields that are declared but not initialized will be set to a reasonable default by the compiler.