Methods

Question 1

returnType

DEFINE:

Answer 1

It specifies what type of value a method returns.
For example, if a method has anintreturn type then it returns an integer value

If the method does not return a value, its return type isvoid

Syntax:
accessModifier returnType methodName(){ 
	// method body
 }

EXAMPLE:
public void printName(String name){
System.out.println(name);
}

Question 2

methodName

DEFINE:

Answer 2

It is an identifierthat is used to refer to the method in a program, could be any name but should be meaningful to increase readability of your code

Syntax:
accessModifier returnType methodName(){ 
	// method body
 }

EXAMPLE:
public void printName(String name){
System.out.println(name);
}

Question 3

method body

DEFINE:

Answer 3

It includes the programming statements that are used to perform some tasks. The method body is enclosed inside the curly braces{ }

Syntax:
accessModifier returnType methodName(){ 
	// method body
 }

EXAMPLE:
public void printName(String name){
System.out.println(name);
}

Question 4

method parameters

DEFINE:

Answer 4

Arguments that we pass inside the method parentheses

// method with two parameters 
public int addNumbers(int a , int b) { 
return a + b;
} 

// method with three parameters 
public int addNumbers(int a , int b , int c){ 
	return a + b + c;

Question 5

What is method in Java?

Answer 5

A method is a block of code that performs a specific task

Methods are functions or behaviors of the class

There are void and return types of methods

Syntax:
accessModifier returnType methodName(){ 
	// method body
 }

Question 6

What are the 2 types of methods?

Answer 6

We use thereturn statementto return any value for return type methods
EXAMPLE:
public int add(int a, int b){
	return a + b;
}

Other methods are known as void methods and these methods do not return any value
EXAMPLE:
public void printHello(){
	System.out.println(“Hello”);
}

Question 7

Method overloading

RULES:

Answer 7

In Java, two or more methodsmay have the same name

This is allowed if they differ in parameters (different number of parameters, different types of parameters, or both).

EXAMPLE:
// method with two parameters 
public int addNumbers(int a, int b) { 
return a + b;
} 

// overloaded method with three parameters 
public int addNumbers(int a, int b, int c){ 
	return a + b + c;

These methods are called overloaded methods and this feature is called method overloading

Note:Multiple methods can have the same name if the number and/or type of parameters are different

Question 8

How to achieve method overloading

Answer 8

Method overloading is achieved by either: (argument = parameter)

-changing the number of arguments

EXAMPLE:
// method with two parameters 
public int addNumbers(int a, int b) { 
return a + b;
} 

// overloaded method with three parameters 
public int addNumbers(int a, int b, int c){ 
	return a + b + c;
}

-or changing the data type of arguments

EXAMPLE:
// method with int parameter
public void print(int a) { 
System.out.println(a);
} 

// overloaded method with String parameter 
public void print(String word){ 
	System.out.println(word);
}

Question 9

Advantages of using methods

Answer 9

-Code reusability:
We can write a method once and use it multiple times

-Methods make code morereadable and easierto debug