Methods:
- A method is a set of instructions that are used to
perform specified tasks that repeatedly occur in the main program.
- It helps to avoid duplication of work and also
breaks down a large program into a number of small functions.
- It is used to divide the complex task into a
manageable task.
Syntax:
return_type method_name (parameter-list)
{
.......................
.......................
}
Where,
- Return_type – Data types.
- Method_name – User-defined name.
- Parameter-list – Parsing variables into methods.
Types of methods:
- There are three types of methods used in java.
1. Methods that do
not return anything and without any parameters.
2. Methods with
parameters passed to them and returning.
3. Methods with
parameters and that are returning data.
1. Java program without parameters and not
returning data:
package exampleprogram;
import java.util.Scanner;
public class Method_Example {
int a,b;//Global
variable
void
sum()
{
int
c;//Local variable
c=a+b;
System.out.println("The sum of two element is :"+c);
}
}
class main_method
{
public
static void main (String args[]){
Method_Example obj=new Method_Example();
Scanner
sc = new Scanner(System.in);
System.out.println("Enter two numbers : ");
obj.a =
sc.nextInt();
obj.b =
sc.nextInt();
obj.sum();
}
}
Output:
2. Java program with parameters and not returning
data:
package exampleprogram;
public class Method_Example {
void
sum(int a, int b) {
int
c;
c = a
+ b;
System.out.println("The sum of two element is :" + c);
}
public
static void main(String args[]) {
Method_Example obj = new Method_Example();
obj.sum(10, 20);
}
}
Output:
3. Java program with parameters and returning data:
package exampleprogram;
public class Method_Example {
int
sum(int a, int b) {
int
c;
c = a
+ b;
return c;
}
public
static void main(String args[]) {
Method_Example obj = new Method_Example();
int c
= obj.sum(10, 20);
System.out.println("The sum of two element is :" + c);
}
}
Output:
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