JavaIntro4.java

//Project Name: Spectrum 4th Program
public class JavaIntro4 {
 /*add 4 to the parameter sent to the method and return the result*/
 public static double addFour(double num){ // the variable 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

 public static void main(String[] args) { //This line lets Java know what to run when you click execute below
 boolean b1 = true;
 boolean b2 = false;
 double x = 10;
 double y = 20;

 System.out.println(addFour(x));

 ifTruePrint(b1, x); //if b1 is true print x
 ifTruePrint(!b1, y); //if b1 is not true print y
 }
}