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
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
Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other ' end--case search function case when sex = ' 1 ' Then ' man ' when
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
If... Then... Else statement
Execute a group of statements conditionally based on the expression value.
If condition Then statements [Else elsestatements ]
Alternatively, use the block Syntax:
If condition Then[statements][ElseIf condition-n
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 .
Tag: The code implementation has one fill highlight than the multi-label roundSometimes the programming for a long time, if you stop to think about it, even some of the most basic knowledge points, it may also make their own circle. In fact, at the
PL/SQL script language value assignment statement syntax table and record comply with the type usage, select the statement if else usage anonymous block (1), assign value statement syntax PL/SQL values use: = "=" some rules need to be observed in
CASE has two formats:The simple CASE function compares an expression with a group of simple expressions to determine the result.The CASE search function calculates a group of Boolean expressions to determine the result.Both formats support the
Java Branching Structure-if...else/switchSequential structures can only be executed sequentially, not judged and chosen, so branching structures are required.There are two types of branching structures in Java:
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