use case statement

Address: http://www.ibm.com/developerworks/cn/rational/r-usecase-atm/index.html Level: elementary Fu chunyi, technical sales manager of Rational China, software department of IBM China Co., Ltd. November 01, 2004 Use Case is a method used to

Case modeling GuideFu chunyi, technical sales manager of rational China, software department of IBM China Co., Ltd.November 01, 2004Original URL: http://www-128.ibm.com/developerworks/cn/rational/r-usecase-atm/@

Use case is a method used to describe system requirements. The process of describing system requirements using use cases is case modeling. The use case method was first proposed by Dr. IVA jackboson and was later integrated into the UML

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

One way to "make something happen" is to evaluate an expression with a side effect. Injected assignments and function calls these expressions with side-effects can be used as separate statements, and this expression is also called an expression

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

SQL statement case when then else end returns a qualified value, sqlcase Case has two formats Simple Case functions and Case search functions: -- Simple Case function CASE sex WHEN '1' then' male 'when' 2' then' female 'else' other 'ends -- Case

Programming | control | Statement SIXTH Chapter CONTROL statement There is a statement that you can find in each programming language control flow statement. In this chapter, I introduce C # 's control statements, which are divided into two main

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

In summary, the use of switch is to determine if the expression after the case matches the expression after switch, and once the case is matched, the subsequent program code is executed, regardless of whether the following case matches until the