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Class, void method()
int method(); string method(); void method(); ect... does the method have to have a return type in class? im trying to inderstand void method() in class i notice it always seems to have a output in the head which you can call from the body... does it always have to be like this?
3 Respostas
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It is necessary to always have a return type on a method. There are some exceptions, such as constructors.
void is a return type.
It means this method does not return a value.
If you want, you can still use the return statement to change the flow of the program.
Example/
boolean isDead;
void attack(){
if(isDead)
return; // return is used
move();
fight();
}
But what does it mean to 'not return a value'?
Compare these methods:
void add(int x, int y){
int c = x + y;
}
int add(int x, int y){
return x + y;
}
int d = add(5, 4);
If this were for the int method, this would be fine. Since the value returned would be 5 + 4.
In other words, I'm assigning d to the value of add(5, 4)
If this were to be for the void method however, it would result in an error. As void does not return a value. What would it mean to assign the value of a variable to a method that has no value?
I would need to write:
add(5, 4);
To change the flow of the program and to do whatever operations in that method I want with c.
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Hey David! How are you today?
No, not necessary to always have a return type. You can print the values to command prompt.
void somemethod()
print("value "+x );
0
faith that was explained really well thanks