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c#c#-4.0operatorsternary-operator
Sanket Thakkar
Sanket Thakkar

Reputation: 723

How to write multiple statements in Ternary operator?

I am posting this question because I found nothing similar regarding this type of post. I am learning ternary operators. I want to perform action like shown below:

  bool Divisible = false;
  foreach (var Number in NumberList))
  {
    var  Number = 242;
    if ((Number %= 2) | (Number %= 6))
    {
       Divisible = true;
    }
    else
    {
       Divisible = false;
    }
  }

We can write this using the ternary operator like this:

var Divisible = (Number %= 2 | Number %= 6) ? false : true ;

But if in else block there are multiple statements then what to do?

  bool Divisible = false;
  foreach (var Number in NumberList))
  {
    var  Number = 242;
    if ((Number %= 2) | (Number %= 6))
    {
       Divisible = true;
    }
    else
    {
       Divisible = false;
       break;
    }
  }

How can we write ternary operator with multiple else statements? Please share your knowledge of ternary operators.

Upvotes: 5

Views: 3784

Answers (3)

CAD bloke
CAD bloke

Reputation: 8798

It's a arguably a shockingly bad idea but you could call methods in the ternary operators that return the type the assignment is looking for. eg

string doNotDoThis = yeahNah ? iToldYou(bad) : notToDoThis(idea);

// ...

string iToldYou(object thing)
    {
    // you can do stuff here with thing but seriously?
    return "yeahNah was yeah";
    }

string notToDoThis(object thing)
    {
    // you can do stuff here with thing but seriously?
    return "yeahNah was nah";
    }

Upvotes: 1

BoltClock
BoltClock

Reputation: 723638

But if in else block there are multiple statements then what to do?

If the statements are unrelated, then you don't use the conditional operator. Just use an if-else like you already have.

In your case, since your code needs to break if and only if Divisible is set to false, then you cannot use a conditional operator even if you wanted to hack it in, because a break is a statement, not an expression, and therefore cannot appear as part of a conditional operator.

In general, you only use the conditional operator when you want to decide between assigning one of two values based on a condition. For anything else, you should really be using a regular if-else construct. Don't try to shoehorn the conditional operator into just about any decision-making code because you'll more often than not find yourself running into problems such as this one.

Upvotes: 5

nsgocev
nsgocev

Reputation: 4470

The ternary operator (that "shorthand if-else") is only intended to evaluate one of two statements based on the boolean. It's not so much a flow-control construct like if; it actually returns the result of the statement it executes. You can't use it to execute code like that.

You can read more on how the ternary operator works here ?: Operator (C# Reference)

Also for your original code you can just do the following : 

var Divisible = !(Number %= 2 | Number %= 6)

Upvotes: 1

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