Lynk Library of Knowledge

9496 Lynk's site for housing knowledge and information for the team.

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Making a Method

• For now just know public static help the program work.
  • A lot of times you can copy patterns from parts of the program without always knowing what they do
• The next value is the return type
  • In the first method its double, in the second its void
  • void is used is when the method won’t send any data back
  • A method could return any type (boolean, string, etc)

Example

 /*add 4 to the paramter sent to the method and return the result*/
    public static double addFour(double num){   // the varible type before the method name is what type will be returned
        return num + 4;                         //return is the keyword that tells java to end the method and send the value
    }
    
    /*if the boolean named bol is true than print out the double named num*/
    public static void ifTruePrint(boolean bol, double num){    //void means the method won't return any value
        if (bol){
            System.out.println(num);
        }
    }                                                           //this method doesn't return a value

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• Methods can have parameters these are places where you can send it information.
• addFour has one parameter num
  • these are like variables that are required to be given a value for the method to work.

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• Return is a java keyword that tells the program what data the method should send back
• If the method returns void you don’t have return in the method at all.

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