How to write this lamda expression

Question

1.00/5 (2 votes)

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given int? a=0;
if 'a' is null then display 'pls enter any number',
otherwise display result as 'a=10'.
can anybody do this above as lambda expression?

What I have tried:

C#

int? a=0;
if(a==null)
{
i=0;
}
else
{
i=10
}

This is normal statement. How to write this in lambda expression?

Posted 14-Jun-16 8:09am

sai401

Updated 14-Jun-16 10:31am

Maciej Los

v2

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Comments

Kornfeld Eliyahu Peter 14-Jun-16 14:11pm

a = (a == null) ? 0 : 10

phil.o 14-Jun-16 16:20pm

This is not a lambda expression :) This is a conditional assignment, or ternary operator.

Kornfeld Eliyahu Peter 14-Jun-16 16:33pm

Yes. And I wrote it as a first step toward a wasted lambda expression...and as the last step away from that if...

phil.o 15-Jun-16 2:11am

There was no pun intended in my reply; I just wanted to make sure that OP does not consider as a lambda expression something which is not.

Philippe Mori 14-Jun-16 14:50pm

Uses code block and indentation for your code.

phil.o 14-Jun-16 16:27pm

If you consider your whole code block as a delegate, and apply the definition of a lambda expression (which, I hope, you've been checking), that's a trivial task. Where are you stuck in this process?

BillWoodruff 14-Jun-16 17:32pm

There is no point in trying to turn a simple computation into a Lambda Expression. You need to review the documentation for 'Lambda.

The moment you assign a value to int? a : it is not 'null, and there is no point checking for 'null.

Sergey Alexandrovich Kryukov 14-Jun-16 21:15pm

Before asking such questions, you have to understand the purpose of lambda. What do you want to achieve?
Please better don't answer just "I want to build a lambda expression", because then I would ask "why? what do you want to do with it?"
—SA

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Maciej Los · Accepted Answer · 2016-06-14T10:31:00

Solution 1

Not sure what you want to achieve, but it seems you want to "translate" your code do lambda...

C#

int i = a==null ? 0 : 10;
if (i == 0)
    Console.WriteLine("Please enter any number!");

Note: your code has no sense, becuase you loose original value of a when it stores not null value.

Posted 14-Jun-16 10:31am

Maciej Los

Updated 14-Jun-16 10:34am

v3