class_Till_Now(P-3)

#programming #learning #java

1)Operators:

Operators in Java are special symbols that perform operations on variables and values.
They are used to manipulate data and variables within expressions

Types of Operators in Java:

1.Arithmetic operators
2.Assignment operators
3.Relational operators
4.Logical operators
5.Bitwise operators
6.Ternary operator
7.Shift Operators

1.Arithmetic:

used to perform simple arithmetic operations on primitive and non-primitive data types.
- : Multiplication / : Division % : Modulo
- : Addition
- : Subtraction

2.Assignment:

'=' The assignment operator is used to assign a value to any variable.
the assignment operator can be combined with others to create shorthand compound statements. Example: example, a += 5 replaces a = a + 5.

1. += , Add and assign.
2. -= , Subtract and assign.
3. *= , Multiply and assign.
4. /= , Divide and assign.
5. %= , Modulo and assign.

3.Relational:

used to check for relations like equality, greater than, and less than
They return boolean results

Relational operators compare values and return Boolean results:

1. == , Equal to.
2. != , Not equal to.
3. < , Less than.
4. <= , Less than or equal to.
5. > , Greater than.
6. >= , Greater than or equal to.

4.Logical:

used to perform "logical AND" and "logical OR" operations.
second condition is not evaluated if the first is false.

Conditional operators are:

&&, Logical AND: returns true when both conditions are true.
||, Logical OR: returns true if at least one condition is true.
!, Logical NOT: returns true when a condition is false and vice-versa

5.Bitwise:

used when performing update and query operations of the Binary indexed trees
used to perform the manipulation of individual bits of a number and with any of the integer types.

1. & (Bitwise AND): returns bit-by-bit AND of input values.
2. | (Bitwise OR): returns bit-by-bit OR of input values.
3. ^ (Bitwise XOR): returns bit-by-bit XOR of input values.
4. ~ (Bitwise Complement): inverts all bits (one's complement).

6.Ternary:

It is a shorthand version of the if-else statement
s a shorthand version of the if-else statement
```
   **condition ? if true : if false**
```

7.Shift Operators:

are used to shift the bits of a number left or right.
They can be used when we have to multiply or divide a number by two.

1.<< (Left shift): Shifts bits left, filling 0s (multiplies by a power of two).
2.>> (Signed right shift): Shifts bits right, filling 0s (divides by a power of two), with the leftmost bit depending on the sign.
3.>>> (Unsigned right shift): Shifts bits right, filling 0s, with the leftmost bit always 0.

2)Datatypes:

Data types in Java are of different sizes and values that can be stored in a variable

Java has two categories:
1.Primitive
2.Non primitive

Primitive Data Types in Java:

Non-Primitive Data Types in java:

contain a memory address of variable values
Reference types won’t store the variable value directly in memory. They are strings, objects, arrays, etc.

https://gitlab.com/ajayraja1817-group/javabeginers.git

In this I made some example programs for primitive and non primitive
Data types.

3)Initialization

Initialization is the process of assigning an initial value to a declared variable.
This is the first time a value is stored in the memory location reserved for the variable.
Initialization assigns initial values to variables.

Example:

age = 30; // Initializes the 'age' variable with the value 30
name = "Alice"; // Initializes the 'name' variable with the value "Alice"
isActive = true; // Initializes the 'isActive' variable with the value true

Declaration:

Declaration is the process of defining a variable by specifying its data type and a unique name.
This informs the Java compiler about the type of data the variable will hold and reserves memory space for it.
Declaration declares the creation of variables and functions

Example:

int age; // Declares an integer variable named 'age'
String name; // Declares a String variable named 'name'
boolean isActive; // Declares a boolean variable named 'isActive'

4)Instance variable: