![Calling Method
public static void main(String[] args) {
methodname();
}](https://image.slidesharecdn.com/javamethod-240501103459-3025bbb7/85/JAVA-METHOD-AND-FUNCTION-DIVIDE-AND-SHORT-pptx-5-320.jpg)
![Calling Method
public static void main(String[] args) {
sayHello();
}](https://image.slidesharecdn.com/javamethod-240501103459-3025bbb7/85/JAVA-METHOD-AND-FUNCTION-DIVIDE-AND-SHORT-pptx-6-320.jpg)
JAVA METHOD AND FUNCTION DIVIDE AND SHORT.pptx
- 1. JAVA METHOD
- 2. METHOD / FUNCTIONS They are used to divide and sort Functionalities within a class so that the code will be readable even if its long.
- 3. Creating Methods modifiers returntype methodname() { //Do anything here }
- 4. Creating Methods static void sayHello () { System.out.println(“Hello World”); }
- 5. Calling Method public static void main(String[] args) { methodname(); }
- 6. Calling Method public static void main(String[] args) { sayHello(); }
- 7. Comments // This is a single line comment /* This is a multi-line comment you can comment here too!! */
- 8. Variable Scoping Global Variable Are variables declared within a class, it can be accessed within a whole class. Local Variable Are variables declared inside a method, condition, loops and any other block of code, it can be accessible within that block of code.
- 9. Arguments / Parameters A value that needs to be passed on a method so that the method can use value and perform various operations on it. PS: You can have as many Arguments / Parameters as you want, they act as a Local variable inside a method/function.
- 10. Method with Arguments modifiers returntype methodName(arguments) { //Do anything here }
- 11. Method with Arguments static void say(String word) { System.out.println(word); }
- 12. Return Keyword return keyword is used to return a value from the method. It is used when a method has a result. Example: A method that performs Math equations. A method that concatenates Strings.
- 13. Return Type The type of the value that will be returned, return type are same as the datatypes. void returns Nothing. int returns integers. String return strings. And so on……
- 14. Method w/ Return modifiers returntype methodName(arguments) { //Do anything here return value; }
- 15. Method w/ Return static int add(int num1, int num2) { return num1 + num2; }
- 16. Overloading Methods You can use the same method name but different parameters so that you will cater to every possibility of a method.
- 17. Overloading Methods static int add(int num1, int num2) { return num1 + num2; } static int add(int num1, int num2, int num3){ return num1 + num2 + num3; }