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/*
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
Switch case is a qualified data in js, which is much simpler than if else. Next I will introduce my understanding of js switch case.
In the if Condition Statement, only one logical condition can exist. if multiple conditions exist, you can use
http://m.blog.csdn.net/blog/tianyazaiheruan/8988420Today qnovations teacher in the use of switch, this design to the most basic content, may forget some of its basic grammar, there are some errors, so impromptu from a variety of data query summed up
Switch syntax The code is as follows:Copy code Switch (expression){Case constant expression 1: Statement 1;....Case constant expression 2: Statement 2;Default: statement;} Default is to execute it if there is no matching case. default is not
The If statement handles two branches and uses the IF-ELSE-IF structure when dealing with multiple branches, but if there are more branches, the more nested IF statements layer, The procedure is not only large but also difficult to understand. Deep
The switch in Swift has been greatly improved in comparison with this part of the objective-c. This is a very interesting thing, because it is still not added to the objective-c, or the fact that the objective-c is a superset of C is not broken.
introduce
This article describes an attempt to switch-case a short string (less than 4) in C + +, as with an integer value, to avoid the overhead of string matching and slightly improve the efficiency of the operation. background
As you know, C + +
View C # (2) through IL)
Switch Statement (lower)
Address: http://www.cnblogs.com/AndersLiu/archive/2008/11/06/csharp-via-il-switch-2.html
Original: Anders Liu
Abstract: The switch statement is a common jump statement in C #. Different codes can be
Two-layer switching technology is a mature development, two-layer switch is a data link layer device, can identify the Mac in the packet
Address information, forwarding based on MAC addresses, and recording these MAC addresses with corresponding
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