C# Operators

Front 1

List the arithmetic operators

Back 1

+ -- addition
- -- subtraction
/ -- division
* -- multiplication
% -- modulo

Hint 1

There are 5.

Front 2

Name the boolean operators.

Back 2

& -- bitwise AND
| -- bitwise OR
^ -- bitwise OR
! -- negation
~ -- bitwise complement
&& -- logical AND
|| -- logical OR
true -- boolean constant
false -- boolean constant

Hint 2

There are 9.

Front 3

What is the string concatenation operator?

Back 3

+

Front 4

What are the increment and decrement operators?

Back 4

++ and --

Front 5

What are the shift operators and what do they do?

Back 5

>> shifts the argument one bit to the right.

<< shifts the argument one bit to the left.

Front 6

What are the relational operators.

Back 6

== -- equality
!= -- inequality
< -- less than
> -- greater than
<= -- less than or equal
>= -- greater than or equal

Hint 6

There are 6.

Front 7

Name the assignment operators.

Back 7

= -- assignment
+= -- addition assignment
-= -- subtraction assignment
*= -- multiplication assignment
/= -- subtraction assignment
%= -- modulo assignment
&= -- arithmetic "AND" assignment
|= -- arithmetic "OR" assignment
^= -- bitwise exclusive assignment
<<= -- shift left assignment
>>= -- shift right assignment

Front 8

What is the member access operator?

Back 8

.

Hint 8

There's only one and it's small.

Front 9

Show the following:
index operator
cast operator
conditional operator

Back 9

[]
()
?:

Front 10

What operators are used to concatenate and remove delegates?

Back 10

+ and - respectively.

Hint 10

There are two and they look familiar.

Front 11

There is a small set of operators that are used to obtain type information. What are they?

Back 11

is, typeof, sizeof

Front 12

In C# you can control how an application responds to an overflow exception. What are the operators that effect this control?

Back 12

checked -- overflow is checked. If overflow occurs then an exception is thrown.
unchecked -- overflow is not checked. If overflow occurs execution continues and the result is truncated.

Hint 12

My brain is about to overflow.

Front 13

What are the indirection and address operators?

Back 13

* -> [] &

Hint 13

There are four. Only one is unique.

Front 14

What are the indirection and address operators?

Back 14

* -> [] &

Hint 14

There are four. Only one is unique.

Front 15

The conditional operator:

What is the result of the following snippet?
int x = 4, y = 5, z = 3;

int r = (x > y)? z : z != y ? z : y;

Console.WriteLine("The value of r is {0}.", r);

Back 15

The value of r is 3.

Front 16

Write an equivalent to the following assignment using a different assignment operator. What is the final value of r?

int r = 5;
r = r % 2;

Back 16

r %= 2;

The value of r is 1.

Front 17

Which operators can be overloaded, in general? Which cannot?

Back 17

The unary arithmetic, binary arithmetic and comparison operators can be overloaded.
The logical operators, the indexing operator, the cast operator, the assignment operators and, in particular, "=, ., ?:, ->, new, is, typeof, sizeof" operators cannot be overloaded.

Hint 17

Compared to arithmetic operators the number that cannot be overloaded is larger.