Shulou(Shulou.com)06/02 Report--

This article is to share with you about the specific .net operators and basic sentences. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it.

.net operator

Operator

C # provides a large number of operators, which are symbols that specify what to do in an expression. Integer operations on enumerations are usually allowed, such as = =,! =, =, binary +, binary -, ^, &, |, ~, + +,--, and sizeof (). In addition, many operators can be overloaded by the user, thus changing the meaning of these operators when applied to user-defined types.

Operator class operator

Basic

X.y

F (x)

A [x]

Xerox +

Xmuri-

New

Typeof

Checked

Unchecked

->

One yuan

+

-

!

~

+ + x

-- x

(t) x

True

False

&

Sizeof

Multiplication

*

/

%

Addition

+

-

Transform

Relationship and type detection

=

Is

As

Equal

= =

! =

Logical "and"

&

Logical XOR

^

Logical OR

| |

Conditional AND

& &

Conditional OR

| | |

Conditional operation

?:

Assignment

=

+ =

-=

* =

/ =

% =

& =

| =

^ =

=

??

Operator precedence

Front + + front-+ (positive sign)-(negative sign)! ~

* /%

+-

>

=

=! =

&

^

| |

& &

| | |

Assignment operation

After + +--

Reloadable operator

C # allows user-defined types to overload operators by defining static member functions using the operator keyword. However, not all operators can be overloaded, and the following table lists operators that cannot be overloaded:

Operator reloadability

+, -,!, ~, +,--, true and false

These unary operators can be overloaded.

+, -, *, /,%, &, |, ^

These binary operators can be overloaded.

=,!, =

Comparison operators can be overloaded (but see instructions later in this table).

& &, | |

Conditional logic operators cannot be overloaded, but can be calculated using & and |, which can be overloaded.

[]

The array index operator cannot be overloaded, but indexers can be defined.

()

Conversion operators cannot be overloaded, but new conversion operators can be defined (see explicit and implicit).

+ =,-=, *, /,% =, & =, | =, ^ =, =

Assignment operators cannot be overloaded, but + = can be calculated using +, and so on.

=,.,?:,->, new, is, sizeof and typeof

These operators cannot be overloaded.

Grammar

Public static Complex operator + (Complex C1, Complex c2)

.net basic statement

Branch statement

Ternary operator

(.) ? b:c

How to take a value when the value may be empty

(s = = null)? ": s

If else statement

If () {} else if () {} else {}

Switch statement

Switch (var) {case:. Break; default:... Break;}

Iterative statement

Do/while cycle

Do {. } while ()

While cycle

While () {. }

For cycle

For (;) {. }

Foreach,in cycle

Foreach (in) {. }

Jump statement

Break

Terminate the cycle immediately

Continue

End the current loop and move on to the next loop

Goto

Jump out of the loop to the mark position

Goto;

Return

Jump out of the loop and end the method that contains it

Exception block statement

Throw

The throw statement is used to signal that an abnormal condition (exception) occurs during program execution.

Try-catch

The try-catch statement consists of a try block followed by one or more catch clauses that specify different exception handlers and specify that general exception handling uses catch {.}.

Try-finally

The finally block is used to clear any resources allocated in the try block and to run any code that must be executed even if an exception occurs. Control is always passed to the finally block, regardless of how the try block exits.

Try-catch-finally

A common way to use catch with finally is to get and use resources in try blocks, handle exceptions in catch blocks, and release resources in finally blocks.

Try {checked {. }} catch (OverflowException ex) {. }

Overflow monitoring statement

Checked

Test whether a numerical type overflows when doing arithmetic operations, and gets an exception System.OverflowException when it overflows

Unchecked {. } these are the specific .net operators and basic statements, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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