From http://www.cnblogs.com/ggjucheng/archive/2012/12/16/2820834.html
English from http://docs.oracle.com/javase/tutorial/java/nutsandbolts/if.html
If-then statement
If-then statements are the most basic control flow statements. It
Case has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--case search functioncase If sex = ' 1 ' Then ' man 'When sex = ' 2 ' Then ' women
Case has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--case search functioncase If sex = ' 1 ' Then ' man 'When sex = ' 2 ' Then ' women
If ... Then ... Else statementConditionally executes a set of statements based on the value of an expression.
If condition Then statements [Else elsestatements]
Or, use block-form syntax:
If condition Then[Statements][ElseIf condition-n
Use of case, simple case functionA simple case expression that uses an expression to determine the return value.
Grammar:
Case Search_expression
When Expression1 THEN RESULT1
When Expression2 THEN result2
...
When Expressionn THEN Resultn
ELSE
An example given below for Oracle Forms, when a value exists then Execute Query For this value to display the correspondent record else allow user to create a new record for that value.The following is the example given for HR Schema employee table,
If statement a method that makes a variable or some other type of data to make a decision. For example, you may have a
Script to check if the Boolean value is True or FALSE, or the variable contains a number or string value.
Use the IF statement
In the shell of Linux
The IF statement determines which branch to execute through the relational operator to determine the true or false of an expression. The Shell has three kinds of if ... else statements:
If ... fi statement;
if ... else .
Conditional statement, which is a kind of statement that chooses to execute according to the condition in the program, the difficulty lies in how to abstract the condition accurately in the actual use of such statement. For example, to implement the
What is traits? Why do people think of it as an important technology of C ++ generic programming?
In short, traits is so important because it allows the system to make decisions based on the Type during compilation,It is like making a decision based
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