Coding in JAVA

  ⬤ Initialization in Java Initialization in Java means assigning values to variables . It is one of the most important concepts for ICSE students because it controls how data is used in a program. In Java, data can be given to a program in three different stages : Data before execution (Initialization) Data at the time of execution (Parameters) Data during execution (Input using Scanner) 1. Data Before Execution (Initialization) This is the simplest type of initialization. 👉 Here, values are assigned to variables before the program starts running . Example: class Example { public static void main ( String args []) { int a = 10 ; // Initialization int b = 20 ; int sum = a + b ; System . out . println ( "Sum = " + sum ); } } Explanation: a = 10 and b = 20 are initialized before execution The program will always give the same output ✅ Best for: Fixed values ❌ Not flexible 2. Parameter at ...

Expressions, Statements and Displaying Data in Java  Expression:   Java is one of the most powerful and widely used programming languages. While writing programs in Java, we frequently use expressions to perform calculations and operations. An  expression in Java  is a combination of  variables ,  constants ,  operators , and method calls that produces a single value when evaluated. In simple words, an expression is a statement that calculates a value. Components of a Java Expression: 1. Variables:   In Java, a variable is a container that is used to store data values. Each variable has a specific data type which determines what kind of value it can hold. Example: int a = 5; int b = 10; int c = a + b; Here  a + b  is an expression. 2. Constants:  In Java, constants are variables whose values cannot be changed once they are assigned. They are declared using the final keyword. In simpl...