Revision-2

Variables are like containers that hold data within our programs.

Data Types Of Variables

• int

• double

•  boolean

• char

Operators In Java allow us to perform various operations on data, manipulate values, and make our programs more dynamic. 

• Arithmetic operators

• Assignment operators

• Comparison operators

• Logical operators

• Bitwise operators

Control Flow In Java structures allow us to make decisions, repeat actions, and control the flow of our programs.

• If-Else Statements

• Loops

  • While Loop

  •  Do-While Loop

  • For Loop

• Switch Statements 

Java Methods  is a block of code that performs a specific task and can be called from other parts of our program. It helps avoid code duplication and promotes modular programming.

Java Functions Functions in Java are similar to methods but are typically associated with functional programming paradigms. They are self-contained and can return a value.

Java Libraries  are pre-written code modules that provide a wide range of functionality to developers. They offer ready-to-use methods, classes, and utilities that simplify complex tasks. To use a Java library, we need to import it into our code using the import statement.

The Scanner class is part of the Java standard library and allows us to read input from various sources, including the keyboard.

• Importing the Scanner Class

• Creating an Instance of Scanner

• Reading Different Data Types

• Reading an integer

• Reading a floating-point number

• Reading a string

• Handling User Input