CODEWITHSUNDEEP
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Ehsan
Ehsan

Reputation: 2285

Two different datatype in function return

In this function I need two different datatype for return, one float when y is not zero and a Boolean when it's zero. 

public XXXXX division(int x, int y){
    if(y!=0){
        return x/y;
    }
    else{
        return false;
    }
}

I know that I can implement this with using two function 1- check correction of division 2- calculate the correct division what I want it in One function, It's possible?

Upvotes: 0

Views: 173

Answers (7)

Jeevan Patil
Jeevan Patil

Reputation: 6079

You can check if the value of Y is zero or not before calling the function itself. Don't allow zero to be passed to that function.

And anyway if you pass zero to the function divide by zero situation will throw ArithmaticException. So your function can throw that exception to the caller.

public float division(int x, int y) throws Exception {   ///ArithmaticException
    return ((float) x) / y;
}

Upvotes: 2

JB Nizet
JB Nizet

Reputation: 691715

Passing 0 as divisor shouldn't be allowed. You should throw an exception instead of returning false in this case:

public float division(int x, int y) {
    if (y != 0) {
        return ((float) x) / y;
    }
    else {
        throw new IllegalArgumentException("division by 0 makes no sense");
    }
}

Upvotes: 5

RE60K
RE60K

Reputation: 621

Maybe you should check it prior:

Pseudocode

if(y!=0){

get division(x/y)

}else{

say Cannot divide by 0

}

Upvotes: 1

NPE
NPE

Reputation: 500307

You could return Float, using null signify "no result":

public Float division(int x, int y) {
    if(y != 0) {
        return x / (float)y;
    } else {
        return null;
    }
}

That said, in this particular case it might actually make sense to return IEEE infinity or NaN.

Note that I've fixed the integer division as it sounds that this isn't what you want.

Upvotes: 1

Sudhanshu Umalkar
Sudhanshu Umalkar

Reputation: 4202

The simplest way-

public Object division(int x, int y) {
    if (y != 0) {
        return x / y;
    } else {
        return false;
    }
}

Upvotes: 1

Habib
Habib

Reputation: 223237

Not really sure if it is a good practice to have a single method for something like that. But you can create your own class with result and error as property and then return object of that class from your method.

Upvotes: 2

mtariq
mtariq

Reputation: 410

Maybe use a Double as a return type and return the value normally. In case of false, return null.

Upvotes: 1

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