<GetStart>
CSPro User's Guide
The CSPro System
Data Dictionary Module
The CSPro Language
Introduction to CSPro Language
Data Requirements
CSPro Program Structure
Programming Standards
Code Folding
Debugging CSPro Applications
Declaration Section
Procedural Sections
Logic
Language Elements
Version
Delimiters
Comments
Preprocessor
Variables and Constants
Expressions
Operators
Operators
String Comparisons
In Operator
Has Operator
If and Only If Operator
Operator Precedence
And/Or Truth Table
Files
Miscellaneous
Data Entry Module
Batch Editing Applications
Tabulation Applications
Data Sources
CSPro Statements and Functions
Templated Reporting System
HTML and JavaScript Integration
Action Invoker
Appendix
<CSEntry>
<CSBatch>
<CSTab>
<DataViewer>
<TextView>
<TblView>
<CSFreq>
<CSDeploy>
<CSPack>
<CSDiff>
<CSConcat>
<Excel2CSPro>
<CSExport>
<CSIndex>
<CSReFmt>
<CSSort>
<ParadataConcat>
<ParadataViewer>
<CSCode>
<CSDocument>
<CSView>
<CSWeb>
If and Only If Operator
This operator has the following truth table:
if and only if (X <=> Y)
Y
X
true
false
true
true
false
false
false
true
The following two sets of code give the same result:
if
( SEX =
2
and
AGE >=
10
) <=> ( CHILDREN_BORN <>
notappl
)
then
errmsg
(
"Children ever born incorrect"
);
endif
;
and:
if
SEX =
2
and
AGE >=
10
then
if
CHILDREN_BORN =
notappl
then
errmsg
(
"Children ever born incorrect"
);
endif
;
else
if
CHILDREN_BORN <>
notappl
then
errmsg
(
"Children ever born incorrect"
);
endif
;
endif
;
See also
:
Operators
,
Operator Precedence