is 2==x wrong ?? if so why?

Answer 1

The x variable must be either one of the integral types or floating point types, then both forms of comparison ( 2 == x and/or x == 2 ) gets evaluted, otherwise it's a compilation error due to the type mismatch.

■■ Some examples ■■

char x1 = '2';
int x2 = 2;
long long x3 = 2LL;
double x4 = 2.0;

string x5 = "2";
int *x6 = nullptr;

// Check 2 against each type
bool b1 = 2 == x1; // legal - false
bool b2 = 2 == x2; // legal - true
bool b3 = 2 == x3; // legal - true
bool b4 = 2 == x4; // legal - true
bool b5 = 2 == x5; // illegal - type mismatch - error
bool b6 = 2 == x6; // illegal - type mismatch - error

Answer 2

https://code.sololearn.com/W2pnqLaDqG6c/?ref=app
I knew it was not wrong but took 30 seconds to try it anyway.
It's not wrong at all, since it compares values with values.
P.S. SoloLearn has a code playground you can use to test these fun experiments yourself 😊

Answer 3

cause 2 is a number ...
and it isn't proper to start with a number.. or symbol...
I think...

Answer 4

It's basically a value==value in that expression. So it's right either way.

Answer 5

secondly 2 and x can't be equal...
.... ...😀

Answer 6

aderinola gbenga if x has the value of 2 it will return true, if not, it will return false.
The user was asking if the expression is possible, which the answer is yes.

I think you misinterpreted the question being asked.

Answer 7

OK then👍

Answer 8

aderinola gbenga its not wrong, and there are no rules against it.

Answer 9

ok, thanks Andre Daniel👍

Answer 10

What are you referring to? I am confused.

Answer 11

if I had to check a value of x using '==', is the above method wrong?

Answer 12

I did try it on my own but I thought it 2==x would be approached differently by the computer

Answer 13

thanks c++ soldier 👍👍