public boolean isValid() {
   boolean check;
   int number = 5;

   if (number > 4){
      check = true;
   } else {
      check = false;
   }

 return check;

if(isValid == true)  // <-- this is where I'm not sure
   //stop and go back to the beginning of the program
else
   //continue on with the program

if(isValid()) {
    // something
} else {
    //something else
}

public boolean isValid() {
   int number = 5;
   return number > 4;
}

if (isValid()) {
    ...
} else {
    ...
}

if (isValid()) {

}else {

}

boolean tempBoo = isValid();

 if (tempBoo) {

 }else {

 }

public boolean isValid() {

   boolean check = false;   // always intialize the local variable
   int number = 5;

   if (number > 4){
      check = true;
   } else {
      check = false;
   }

 return check;

}


if(isValid()){

    // Do something if its true
}else{

    // Do something if its false
}

if (isValid()) {
   // do something when the method returned true
} else {
   // do something else when the method returned false
}

if(isValid())
{

}
else
{
}

if(isValid()){
     //do something....
}
else
{
    //do something....
}

public boolean isValid() {
   boolean check;
   int number = 5;

   if (number > 4){
      check = true;
   } else {
      check = false;
   }

 return check;