Conditional Constructs :-
- Switch
- If
- If Else
- If Else If ladder
- nested If
Looping :-
- While
- Do While
- For
- For each
JAVA Data Types :-
(1) Primitive :
1. Integral
2. Boolean
3. Floating
(2) Reference :
1. Object
2. String
byte data type is an 8-bit signed two's complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive). The byte data type can be useful for saving memory in large arrays, where the memory savings actually matters. They can also be used in place of int where their limits help to clarify your code; the fact that a variable's range is limited can serve as a form of documentation.short data type is a 16-bit signed two's complement integer. It has a minimum value of -32,768 and a maximum value of 32,767 (inclusive). As with byte, the same guidelines apply: you can use a short to save memory in large arrays, in situations where the memory savings actually matters.int data type is a 32-bit signed two's complement integer. It has a minimum value of -2,147,483,648 and a maximum value of 2,147,483,647 (inclusive). For integral values, this data type is generally the default choice unless there is a reason (like the above) to choose something else. This data type will most likely be large enough for the numbers your program will use, but if you need a wider range of values, use long instead.long data type is a 64-bit signed two's complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive). Use this data type when you need a range of values wider than those provided by int.
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| Java can run on any Hardware and Software interface. |
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| A program coded in Java is compiled by Java Compiler (javac) - JDK (Java Development Kit) and it creates a machine independent byte code (.class file) which we can run by using JVM (Java Virtual Machine) which has a compiler named JIT (just-in-time). |
