Diffrence between expression & statement in java

In Java, statements, expressions, operators, and operands are fundamental concepts related to writing and executing code. Let’s define each of them:

1:Statements

In Java, a statement represents a self-contained execution unit.. It represents an action or a sequence of actions that perform a specific task. Statements typically end with a semicolon (;) and can include variable declarations, assignments, method invocations, control flow structures (e.g., if-else, loops), and more.

int x = 5; // Variable declaration statement
System.out.println(“Hello, world!”); // Method invocation statement

2:Expressions

An expression is a combination of variables, constants, literals, method invocations, and operators that evaluates to a single value. Expressions can be as simple as a single variable or complex, involving multiple operators and operands.

int result = 2 + 3; // An expression (2 + 3) that evaluates to 5

3:Operators:

Operators are symbols or special keywords that perform various operations on operands. They can be unary (acting on a single operand) or binary (acting on two operands). In Java, a diverse set of operators is available, encompassing arithmetic, assignment, relational, logical, bitwise operations, and many others.

int sum = 5 + 3; // Addition operator (+)
boolean isGreater = (10 > 5); // Relational operator (>)

4:Operands

Operands are the values or variables on which operators act. They can be literals (constant values) or variables (memory locations that store values). Operators manipulate operands and produce a result.

int x = 5; // The variable 'x' is an operand
int y = 3; // The variable 'y' is an operand
int sum = x + y; // Addition operator (+) acts on operands 'x' and 'y'

It’s important to understand how statements, expressions, operators, and operands work together when writing Java code, as they form the building blocks for creating programs and performing computations.