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App.java
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App.java
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public class App {
public static void main(String[] args) {
}
}
// القسم الثاني : شرح انواع البيانات الذي يمكنك تخزينها في جافا
//------------------------------------------------------------------
// Part 2: Explain the types of data that you can store in Java
//------------------------------------------------ ------------------
// byte 1 byte Stores whole numbers from -128 to 127 2*2*2*2*2*2*2
// short 2 bytes Stores whole numbers from -32,768 to 32,767
// int 4 bytes Stores whole numbers from -2,147,483,648 to 2,147,483,647
// long 8 bytes Stores whole numbers from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
// float 4 bytes Stores fractional numbers. Sufficient for storing 6 to 7 decimal digits
// double 8 bytes Stores fractional numbers. Sufficient for storing 15 decimal digits
// boolean 1 bit Stores true or false values
// char 2 bytes Stores a single character/letter or ASCII values
// Primitive types are predefined (already defined) in Java. Non-primitive types are created by the programmer
// and is not defined by Java (except for String). Non-primitive types can be used to call methods to perform certain operations, while primitive types cannot.
// A primitive type has always a value, while non-primitive types can be null.
// A primitive type starts with a lowercase letter, while non-primitive types starts with an uppercase letter.
// The size of a primitive type depends on the data type, while non-primitive types have all the same size.
// القسم اول : طريقة انشاء متغيرات في جافا
//------------------------------------------------------------------
// القسم الثالث :شرح للقوانين انشاء اسماء متغيرات في جافا
//------------------------------------------------------------------
// Part 1: How to create variables in Java
//------------------------------------------------ ------------------
// Part 3: An explanation of the rules for creating variable names in Java