You cannot use the switch statement in ASP, you need to use the Select Case statement
A Brief introduction
Select the work of the report, if the statement. The difference, however, is that they can check for multiple values. Of course, you haveMany of the same, if. Else statement, but this is not always the best method.The SELECT statement allows a program to evaluate the expression and attempt to match t
Switch-case retrun break, switch-caseretrun
{
If statements process two branches, the if-else-if structure must be used when processing multiple branches. However, if there are many branches, the more nested if statement layers, the program is not only huge but also difficult to understand. therefore, the C language provides a condition selection statement speci
Grammarsyntax for switch statements in the Swift language:
Copy Code code as follows:
Switch Expression {
Case expression1:
Statement (s)
Fallthrough/* Optional *
Case Expression2, Expression3:
Statement (s)
Fallthrough/* Optional *
Default:/* Optional *statement (s);}
Note: In most
Switch statements in PHP are used to perform different actions based on multiple different conditions. If you want to selectively execute one of several blocks of code, use a Switch statement.
Switch syntax
The code is as follows
Copy Code
switch (expression)//Set expression{
$a=5;switch($a){ case 6: echo "\$a is 6"; case 5: echo "\$a is 5"; case 4: echo "\$a is 4";}
As in the above example, my understanding is that each time $ A is compared to the value of the case, the output statement is the same, and the non-conformance is the nex
The Switch...case statement in Swift can determine the object type, and the objective-c must be an integer.Can not penetrate, can not write break,
var rank = "A"
switch rank{case
"a"://equivalent to if
print ("excellent") Case
"B"://equivalent to else if
Switch as an essential statement in the selection structure is also added to Swift, as long as people with programming experience are not unfamiliar with switch statements, but Apple has greatly enhanced the switch to have features that are not available in other languages. Using the switch statement is simple:
In an IF condition statement, a logical condition can only have one, and if there are multiple conditions, it can be resolved using nested IF statements, but this method increases the complexity of the program and reduces the readability of the program.
Using the switch Process Control statement can solve these problems perfectly, with the following basic structure:
Switch statement syntax
The
My answer is, more than two else if, or switch for more than two case. But is it normal to use a lot of if else and switch case in your code? Wrong! Most of the more than two of the if else and switch case should not appear as har
First, the principle is to explain the problem:switch (expression){case constant Expression 1: statement 1;....Case constant Expression 2: statement 2;Default: statement;}1.default is that if you do not have a matching case, default is not required.The statement after 2.case can be used without curly braces.the judging
A C#/cshorp switch statement is a control statement that handles multiple selections and enumerations by passing control to a case statement within its bodyint caseswitch = 1;Switch (Caseswitch){Case 1:Console.WriteLine ("Case 1");BreakCase 2:Console.WriteLine ("
", a);//bitwise NON ~: If it is a signed number, the binary highest bit represents the sign bit , 1 for negative , and 0 for positive //data is stored in the form of complement in memory , positive complement is positive , negative complement is absolute minus 1 6. A byte represents a 8-bit binary number range of values for data types: A. unsigned:Char 0 ~ 2^8-1Short 0 ~ 2^16-1int 0 ~ 2^32-1B. signed:Char-2^7 ~ 2^7-1SHORT-2^15 ~ 2^15-1int-2^31 ~ 2^31-1*/7. If...else ... Relatively simple,
The Switch-case statement in Process Control has always been a weakness of mine.
Whenever the exam or interview written test, always confused, I think this should be my foundation is too poor reason!
In order to completely solve this problem, we have to spend a little effort!
First of all, explain the problem from the principle:
switch (expression)
{
ThinkPad Series Models When you reinstall the system, or in other cases, you cannot distinguish between the input method's case or the keypad switch when editing the document.
This problem is generally caused by hot key drivers.
Operation Steps:
ThinkPad Series models after reinstalling the system, or in the case of newer drivers such
- , StatementConcept: a semicolon (;) represents the end of a statementHabit: Write only one statement on a single line; write multiple statements on a line (poor code readability)Statement BLOCK: You can include multiple statements "{}" to wrap multiple statementsU conditional statements* If statement* If...else Statement* ELSE if statement* Switch...case StatementIf statement:If...else statement:Switch...
Accustomed to C # syntax, encountered multiple branch calls, in addition to the simplest if-else, then is switch-case, so the use of JavaScript is very easy to write the following code:
Copy Code code as follows:
JScript Source Code
The value of something is 1, 2, 3 ...
Switch (something) {
Case 1:
Todoa
Sometimes it seems that Swift's grammar is really powerful and perverted, not to mention, directly on the code:First, define a vehicle's parent class.Class vehicle{var wheels:int!var speed:double!Init (wheels:int,speed:double) {Self.speed = SpeedSelf.wheels = Wheels}Func run () {println ("The \ (Self.wheels) wheels is running as \ (self.speed) Speed")}deinit{//a destructor similar to other programming languages, releasing objects when exitingSelf.wheels = NilSelf.speed = Nil}}Create a Bike Class
Learning the Python language, it took a long time to find that Python does not have switch-case statements, view the official document that can be used if-elseif-elseif .... Replace.
Truth be told, none of this is a problem. is not a condition to judge it. -....... with If-elseif Certainly no problem, but also with other solutions, relatively simple is to use
Dictionary to achieve the same function. Write
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